Soon after arriving from Africa, Sahara, a mixed-race 15-year-old, is driven by CPS to a foster home in the suburbs. At the house, run by “Auntie,” she finds four teenage girls who object to her presence and make her life miserable. But, little by little, the girls form an unlikely sisterhood.

Nathaniel (17 years old) was just abandoned by his long-time imaginary friend, Amélie. At the Board of Imaginary Support, Nathaniel is being convinced that he is now too old for an imaginary friend but the teenager is afraid of being alone. He is therefore assigned Bertrand, an old-timer with unorthodox methods. But the new duo combined with Nathaniel's obsession for Amélie will create a chain of risks that might just head right to a catastrophe...