Pua arrives at Big Springs, and asks Basi if the fish are ready. Basi explains that whilst there are more than last time, there are still not enough for him and his float. He invites them to return next week, and Pua agrees. One crocodile, however, is not happy when Pua tells them to move on for the day. Makuu feels that Pua is weak for not ignoring the hippos words, and challenges him to a Mashindano. When Beshte asks his father what it is, Basi explains that it is a fight which will determine the leader of the crocodiles. Pua accepts, and the event is set.
The Mashindano begins that evening, with many spectators coming to watch, constantly chanting as the two crocodiles face off. The battle rages on, with Pua using many techniques to pull Makuu down. However, Pua soon grows tired, and Makuu's youth secures him the victory, much to Kion's disappointment. Simba congratulates Makuu on his win, and thanks Pua for his service over the years. Defeated, Pua leaves, as Basi explains that the loser is banished from the crocodile float.
With Makuu in charge, the float takes over Big Springs, pushing out Basi's Pod. This, in turn, creates a chain effect which results in many Pride Landers shifting about and being forced to live in new habitats. Kion comes to speak with Makuu, who is itching for a fight. The rest of the Lion Guard are equally anxious to fight, but Kion refuses, trying his best to ignore Makuu's vicious taunting and trying to avoid using the Roar on him.
Later, having spoken with the previous leader, Pua, as well as his grandfather, Kion returns to the float. With Makuu still itching for a fight, he gives Makuu a demonstration of his power. After seeing its power, Makuu is left open mouthed. He then decides to leave Big Springs, claiming that the fish were running out of the lake anyway. When he and his float are leaving, Basi invites him back when the fish are ready. Makuu says he'll keep it in mind in a rather tired tone, and returns to Lake Matope.
Makuu listens to Kion, who explains to Bunga that he no longer wishes to use his Roar When one of his float members ask if they're going back to Big Springs, Makuu exclaims that The Flood Plains could be theirs instead. Shortly after, they drive all other animals out, with Makuu ordering the terrified Pride Landers to leave and tell all of their friends that The Flood Plains belong to the crocodiles.
Fuli then races to the floodplains, and is soon followed by Bunga and Beshte. Makuu remains composed, and reveals to them that Kion is too 'coward' to use the Roar. Fuli does not understand, but is confident that they do not need the Roar to kick them out. Fuli takes on Makuu, leaving Bunga and Beshte to the rest. Makuu pursues the cheetah, who narrowly dodges his fangs on a few occasions. Eventually, Fuli lands on Makuu whilst he is in the water, allowing Makuu to obtain the upper hand in battle. With Fuli out, the rest of his fleet emerge from the water, closing in on the trio. Makuu asks if they really believed he would try to take over the Flood Plains with three crocodiles, and Bunga comments that he kinda did.
They arrive, and Kion and Nala inform Makuu that he is welcome to share the water, but that he doesn't own it. Makuu's Fleet ignore them and knock Nala into the water, with Makuu certain that he won't do anything. Kion almost uses the Roar, but calms himself, refusing to use it in anger again. Makuu taunts Kion and he again falters, but his mother tells her son to believe in himself. With newfound confidence, Kion uses the Roar to strike a single line of water, pushing back the crocodiles surrounding his mother one by one. He then uses the Roar one more time after warning Makuu, blasting the crocodiles away. His mother makes her way to shore, proud of her son. Bunga and Beshte are happy for Kion, and Fuli exclaims that she had no idea that the Roar could do that. Kion admits that he didn't either, and that he just needed faith. His mother states that she always had faith in her son.
Makuu and one of his float members locate Young Rhino, who is trapped among the reeds of the Flood Plains. Makuu is sure no one will find him in the mess, but Beshte arrives just in time. Makuu thinks he has the upper hand with a two on one fight, but Basi arrives and the crocodiles relent.
Later during the day, another rainstorm breaks out and Makuu plus four of his float members locate a wounded Basi in the Flood Plains. He believes that taking out the hippo will mean no more rules to follow, and he starts to approach him when suddenly Beshte returns to defend his father. Makuu reminds them that they're outnumbered and that they're crocodiles, showing no fear. However, Beshte and Basi create a new Hippo Lane which leads the float to Bupu's Herd as they stampede down the lane. Despite diving, the crocodiles are trampled by their hooves. When the injured crocodiles surface, Beshte orders them to leave and they do so, in too much pain to try another attack.
When Makuu tries to strike down a tickbird named Mwenzi. His rhinoceros companion, Kifaru, tries to save him but instead gets his horn lodged in a tree stump. Makuu then summons the rest of his float to help him take down the rhino, but the Lion Guard arrive before they can attack. The crocodiles attack the Lion Guard and manage to get the upper hand, but with Mwenzi's help, Kifaru gets loose and tackles the crocodiles. By the time Kifaru has finished with them, they decide to retreat.
After the Lion Guard accidentally awakens the float from their hibernation, Kion and Makuu go to speak with Kion's father, with Makuu instructing his float to remain where they are until his return. When they've gone, Kiburi orders the float to search for water on their own.
As infants, Kion and Bunga encounter Makuu's Float, while it is under Pua's leadership.
Although Kion is cautious, Bunga steps forward and orders the crocodiles to move aside for them. Makuu and Pua wonder about the identity of the cubs. Kion warns the float against messing with them, and Pua gently orders them to leave. Makuu asks if they meant to challenge him and Bunga replies he will, and before asking what "challenge" meant. The crocodiles surround the cubs, but Zazu arrives just in time.
Zazu informs the crocodiles that Kion is the King's son. But Makuu also states that they initiated a challenge, and Pua backs him up, telling him of how Simba respects the crocodile ways. Zazu confirms his respect for their ways, and leaps into Makuu's open mouth, telling the crocodiles that Kion's safety was his concern, and he would take his place. Seeing his bravery, Pua allows the trio to leave and warns the cubs not to come to their area again.
Makuu and his float are sparring when the Lion Guard interrupt by accident. When a herd of buffaloes charges through, Makuu makes sure that his float is safe. While saving another member, he injures himself, which is witnessed by a gecko named Hodari. Later, when the Lion Guard leave and Makuu's float return to sparring, Hodari asks Makuu if he can be a member of his float. Makuu laughs him away, uninterested in having a lowly gecko in his float. Unbeknownst to them, Hodari joins Kiburi's float instead.
Later, Makuu receives word from the Lion Guard that Kiburi's Float have been seen in the Pride Lands. Despite Makuu's injury still present, he assures the Lion Guard that they can take care of themselves. When they leave, Kiburi's float attack Makuu's float. However, having learned all the moves from Hodari, Kiburi's float are easily able to counter all of the moves used by the crocodiles in Makuu's float. Despite being thrown out of his float, Hodari sees Makuu in danger, and quickly arrives to help Makuu defeat Kiburi. After being knocked away, the Lion Guard arrives, where Kion uses his Roar to force Kiburi's float back into the Outlands. Having seen his bravery, Makuu accepts Hodari as an honorary crocodile and member of the float.
When Kion gathers up Pride Landers to help fight the Outlanders he gets Makuu's float to help them train. Makuu didn't like how the animals weren't doing his moves right. The crocs go back to the Watering Hole and Makuu complains that him helping them was a waist of time. Soon Scar's Army comes and tries to attack their Watering Hole. The Pride Landers came to save them. After Kion uses the Roar of the Elders on the army Makuu thanks the Pride landers for their help and says that he'll help them if they need it.
Makuu and his float helps everyone in the Pride Lands fight agaisnt Scar's army. That night Scar comes on top of Pride Rock and says that the Lion Guard is gone. However Kion says that he's wrong and they're okay. The herds are about to give up but Kion convinces them to help. Janja soon tells everyone how to defeat Scar. Simba doens't trust him at first but Makuu convinces him. Janja says that Kion's roar will defeat Scar. The next day Kion leads everyone into the Outlands to attack. Later Kion and the guard comes out of the volcano and says that Scar has been defeated. Makuu's float then says goodbye to the Lion Guard as they search for Tree of Life.
The water overflows in the Pride Lands, allowing Makuu's Float to swim freely across a large portion of the Pride Lands. The Lion Guard see that Zuri is trapped on a rock surrounded by Makuu's Fleet, who are itching to take a bite out of her. Kion tries to reason with Makuu, but the leader is adamant that his fleet are allowed to remain where they are as per the rules of the Pride Lands. Kion and the Lion Guard are able to rescue her after devising a plan, and the crocodiles are defeated once Kion uses his Roar of the Elders on them. A dam is created, and the crocodiles return to their usual territory.