She will do anything to find her lost twin sister. But first she must lose herself. Alysa Grey is certain her lost twin sister is alive even though Hawaii search and rescue gave up years ago. Meanwhile, her strange ability to heal from injury threatens to end what passed for normal teenage life. When she meets Nate, a handsome surfer, he presents the opportunity to escape her woes. Alysa convinces her best friend to sneak off to Hina where Nate lives with a secretive group called the Ocean Alliance. But Nate is not who he seems and Alysa and her friend end up trapped on an aging ship bound for a mysterious island. She discovers that her unusual powers and lost sister are connected. Now a sinister enemy on-board the ship is determined to kill Alysa the moment they achieve their vast goal: unleash devastation upon the world’s oceans. Everything will depend on Alysa finding out what happened to her missing sister, no matter how painful. As she uncovers the shocking truth, she learns that sometimes it's much easier to be lost than found.