Martin, the illegitimate son of an industrialist and a hairdresser, was sent to live with his wealthy father in the countryside as a young boy. Alice is a musician living with Martin's half-brother in Paris. When Martin shows up at Alice's door after fleeing his father's home under troubled circumstances, their lives become intertwined.

Benoit turns 13 and develops an intense crush on his godmother, Marion. As they lie on beaches in the summer, she humors him by talking about the mysteries of women.