Unable to meet all the demands of his job and family anymore, Mathieu feels he's in a mid-life crisis and hurriedly leaves for the forest. His relatives are left by themselves, faced with his sudden departure and their choices.
Alexis Pasquier, a young French teacher, begins his first day of classes at the Nancy prison. There he meets Léa, a young woman with whom he falls madly in love. Two worlds open up to him: true love and the prison environment. He will never be the same anymore.