Fatou decides to organize a surprise party for André. But after a misunderstanding between André and Roger, the shark decides to head out to sea and find his family! Roger and Fatou are going to have to stop André from leaving (without telling him why of course), while at the same time, looking after preparations for the festivities. But following a bunch of very dubious maneuvers, the party turns into a disaster...for everyone except André who, to everyone’s surprise, loves his...surprise party!