Rivages

Oceanologist Abigail returns to Fécamp on an Ifremer mission investigating a trawler's mysterious sinking. As unexplained sea phenomena persist, she confronts the past she fled years ago.

A second ship collides with an unknown obstacle, prompting a navigation ban. Abigail's push for drastic measures angers the fishing community. Meanwhile, her stepson Jimmy witnesses strange luminescence at sea, adding to the mounting mystery.

A WWI bomb explodes underwater, injuring Abigail's sister-in-law Silvia, an eco-activist. Shocked, Abigail defies the sea ban to study seismic activity off Fécamp. The scientist risks all to understand the mysterious events unfolding in the waters.

Commander Calderi's troops arrive at Fécamp port. Abigail, aided by Jimmy and his friends Axelle, Youssef and André, investigates the sea's electromagnetic disturbances and the odd luminescence Jimmy spotted, seeking to unravel the mystery.

Diving into the rift, Abigail uncovers the mystery haunting Fécamp Bay. The truth emerges as she discovers an unknown creature lingering in the area, unable to abandon its young that had perished in fishermen's nets.

Abigail has decided to help the creature leave its young and the bay. But the army wants to capture it. With the help of André, Axelle, Youssef, and Julien, she devises a plan to rescue it and restore peace to Fécamp.