The deep complicity between a grandmother and her granddaughter.

Annabelle refuses to let her grandmother go to a retirement home. With her best friend Leo, she decides to organize Mamilou's escape while her worried father tries to track down the fugitive. Along the way, Mamilou runs into old Gustave, a childhood friend who lives in a house share with Marguerite, René, Marcel and Simone. Conveniently, there happens to be one spare room in the big house...