The team are left stunned by another murder connected to the killing of festival queen Tiana. But there is a new lead—a phone call relating to their initial suspect—so DI Jack and his officers travel over to nearby Rosalie Island, where the owner and employees of a lucrative investment company all fall under suspicion as they are questioned about the mysterious call. Meanwhile, with emotions running high, Ruby encourages her uncle, Commissioner Patterson, to show his emotional side for once.

Old mates Jay, Gerald, Adam and David arrive on Saint Marie ready for the holiday of a lifetime at the Crystal Bay Horse Ranch. The occasion soon turns sour when the island is shaken by a torrential storm, and ranch owner Hannah advises the men to wait it out in their tents. By morning, Jack thinks he has seen the worst of it, until he opens up the locked police station and finds the body of a man lying in the middle of the floor. It's Adam, with scratches on his arms and laceration marks around his neck.