Raven Weir survived death while protecting her friends and Atlantis, and she is settling into her new life as the Guardian. Unfortunately, Raven's attempt to protect the teenage hellhounds makes Cerberus an enemy. The dead are climbing out of their graves and are coming for her. Sam Westing's granddaughter, who is the new Oracle, has been kidnapped. When Raven thinks things can't get worse, Poseidon attempts to be a father to her and Hades...