You can't be afraid of the dark when you're the monster lurking in the shadows. As an assassin working for the pirate queen, Sorinda is surprised when Alosa's next task for her is not to kill a new target, but to captain a handpicked crew on a rescue mission. Unfortunately, her sailing master is Kearan. He may be the best helmsman the pirate queen has, but Sorinda finds him a real pain in the arse. Sadly, there are few places on a ship to hide from an attentive man. As the crew of the Vengeance faces dangerous waters and deadly sea creatures, they accidentally awaken the King of the Undersea, a being who can control the dead. Their rescue mission quickly turns into a fight to save the world, but first, Sorinda must save herself from becoming an undead queen.