Navigation is prohibited after a container ship deviates from its course by hitting an unknown obstacle. Abigail, who alerted the authorities to the risks of navigation, is faced with the anger of the fishing community, including her father, Henri, and Julien, her husband and father of the child they lost. Jimmy, Abigail's stepson, witnesses a strange luminescence phenomenon on the sea.

Soldiers, led by Commander Calderi, have invaded the port of Fécamp. With the help of Jimmy and his acolytes, Axelle, Youssef and André, Abigail tries to identify the source of electromagnetic disturbances in the sea, and the strange luminescence observed by Jimmy.