The psychiatry department of a young doctor Cora has just admitted a young lady who refuses to speak and whose identity remains unknown. Cora becomes fond of her patient and establishes a relationship which goes beyond the usual course of treatment. She feels a kind of "call" from this woman as a strange and strong tie grows between them. One day, Cora learns that the identity of her patient has been discovered. Her name is Loa, she is a stranger, she has been sent back home…to Iceland. Cora, who had no idea of this woman's life outside their relationship, is deeply moved : she decides to meet up with her in order to finish the treatment.

Samir, a lanky crane operator in Montreuil, falls madly for Agathe. As master swimmer at the pool Thorez he decides to take swimming lessons with her. But the lie does not last three lessons - Agathe hate liars. Chosen to represent the Seine-Saint-Denis, Agathe flies to Iceland for the 10th Congress of the International Masters Swimming. Samir has no choice but to fly in turn also.