Nina Delmas and Morgane Saroyan, two members of SNSM station in Port Camargue, find the body of Patrick Catala, 46, president of the association, drowned in the port. He was devoted to maritime rescue and apparently had no enemies. Lieutenant Lebellec learns that there have been several complaints against the station for response delays, and that someone was sabotaging the SNSM shuttle. Jules Gomez, the station mechanic, and Paul's childhood friend, is the main suspect.