The zany scrapes four friends get into, as recorded by their elementary school teacher.

The school is having a costume contest for Carnival. Lucas' friends are delighted, but he's paniced: he'll never win with his frumpy old penguin getup! Casting about for inspiration, he snoops on his friends to see their disguises. But Nico, Bastien, and Élisa are determined to keep theirs a secret. Who's going to get the mystery prize?