Fatou has lice and Roger refuses to play with her until she gets rid of them. Problem: Fatou, who is persuaded that the anti-lice shampoo her father has given her is going to itch like heck, refuses to use it. So she pretends to be cured and in the process, contaminates the entire jungle with her lice. Continuing her lie, Fatou has set everyone a big challenge, especially Roger, who, in order to get rid of his lice, is going to invent the wackiest cures until the entire island is threatened with catastrophe…