Exhausted by settling his lemur subject's disagreements, King Julien replaces himself with a dummy king so he can play hooky, unwittingly sparking a rebellion.
Uncle King Julien, set on reclaiming his throne, convinces Julien to go into Foosa territory. Julien creates a Foosa disguise and forces Maurice to help him.
While Julien is busy atoning for offending Maurice, Mort is busy joining a new political group...one that advocates the overthrowing of the current king.