William, a man of thirty years, lives alone in a caravan in the countryside. Considered depressive, it is followed daily by Sonia, a nurse at home, which applies snapped a treatment prescribed by the doctor Decoure. Former competitive swimmer, he will practice today more than apnea, without looking for performance in a tub located a few meters from his trailer. Each dive, William share dreams that evolve according to its condition and daily life. One day, Sonia goes on vacation and is replaced by Lucia, a young Russian woman who lives alone and away from family that tackles William by looking at him, while revealing itself. Loneliness and the opening of characters will help bring them despite the difficulties related to patient status William and Lucie obligations.