Jean-Louis Milesi plays a man in his mid-fifties who has become involved with a woman who has a two-year old son, Lino. The man isn't sure who the boy's father is, and given his girlfriend's checkered past, he's not inclined to find out. However, when she dies following an overdose of drugs, the man finds himself looking after the boy, who has started calling him "Papa." In time, the man does some digging and finds a man who seems a good bet to be Lino's biological father, but with no firm proof the family is reluctant to claim the boy, and the man Lino thinks of as his dad becomes an unwilling parent..