Sandra lives in a small apartment in Paris with her eight-year-old daughter. She regularly visits her father, Georg, who suffers from a neurodegenerative disease that undermines his capacities day by day. While she embarks with her family on an obstacle course through nursing homes to install Georg in a safe place, Sandra unexpectedly runs into Clément. Although he is not free, a passionate relationship begins.
After her father, mother, older sister and little brother are killed by her father's employers, the 12-year-old daughter of an abject drug dealer is forced to take refuge in the apartment of a professional hitman who at her request teaches her the methods of his job so she can take her revenge on the corrupt DEA agent who ruined her life by killing her beloved brother.