Jessica investigates the attempted murders of a legendary Broadway actress and her talented daughter, due to star in a new musical production. But as Jessica uncovers the truth, her own life is put in danger.

Jessica goes on a cruise with her friend Pamela, who has just been released from a sanatorium where she was recovering from the suicide of her husband Johnny. However, on board the ship Pamela is the victim of a terror campaign, and then another passenger is found dead.