The story of Lucas and how he helps others as an angel. This is an innovative, educational drama that resembles a documentary.

1983. Lucas is 12 years old. He must keep company, during the holidays, with Erwan (15 years) whose parents left alone on a trip. Erwan transfers his bitterness at being neglected to Lucas. He treats him like a dog, forcing him to eat only bread and cheese, and to live without clothes, "like a dog".