While researching human memory for the government's secret lab, scientists Richard and Sayoko Robbins suddenly disappear and are presumed dead. Ten years later, their daughter, Ashley, receives a letter from Richard, telling her that he is still alive and sequestered in a lab on Blood Edward Island. Ashley traces the letter to the island to find the truth behind her parents' mysterious disappearance. Once there, she discovers that her parents had been working on a memory-generating computer called Trace, but the connection between Trace and their disappearance remains unclear. While searching for Richard, Ashley befriends a ghost named D, who is looking for answers of his own. Having lost all his memories and any recollection of his death, D is destined to remain in limbo and wander the island until he recovers them. Together, they set off to find the truth of their pasts.