In order to keep his job at the zoo, David agrees to transport a certain cargo on a cruise ship. Taking advantage of this opportunity, he invites his ex-wife and son, with whom he wants to mend his relationship, on the tour. However, when David's colleague accidentally opens the package, a charming baby marsupilami, a red, furry creature that is the target of all the world's poachers, is released. The marsupilami is not only a master of dangerous pranks but also holds the key to eternal youth. The trip quickly turns into a chaotic mess.