Patrick is a tenacious lawyer specializing in environmental law. France is a schoolteacher who becomes an activist after her husband develops cancer from exposure to a pesticide. Mathias is an ambitious lobbyist working for an international chemical corporation. The paths of these characters collide as the lives of thousands are affected by a tragic act that sparks a powerful movement while the corporation fights to prevent the truth from being revealed.

The trawler Marie-Morgane sinks suddenly and inexplicably with all its crew, including Captain Lenormand and his son. When Nolwenn Lenormand hears the news she's convinced that a submarine on maneuvers must have been responsible.

Hunting down killers to help bereaved families get justice is more than just a job; it’s a duty for Thomas Bareski, a retired, hotshot police detective eager to reopen unsolved murder cases in a mission to find the culprits.

In Brittany, a notary is killed with shots to the head. His wife Joséphine is a suspect. Her husband had just sold part of their property to two shady real estate developers who wanted to transform the little fishing village into an ultra-modern marina for wealthy clients.

Dimitri, the little bird from northern Europe, has landed on the plain of Ubuyu in Africa. Every day he learns to overcome his fears and discover a world full of surprises. In Ubuyu being different is an asset that he will share with Makeba the giraffe, Oko the zebra and Pili the meerkat.