A year after Sheila is killed in a hit-and-run, her multimillionaire husband invites a group of friends to spend a week on his yacht playing a scavenger hunt-style mystery game — but the game turns out to be all too real and all too deadly.

The younger brother of an assassinated US President is led down a rabbit hole of conspiracies and dead ends after learning of a man claiming to be the real shooter.

Two friends, Commissioner Servolle and real estate developer Faguet, see their friendship tested by the investigation carried out following the murder of Faguet's wife.