Two days before her fourteenth birthday, Ashley Mizuki Robbins receives a package from her father, Richard Robbins, whom she believed to be dead. Inside is a small handheld device called a Dual Another System, or DAS, along with an invitation to meet him on Blood Edward Island.

The next day, Ashley and her aunt Jessica Robbins travel to the island. There, Ashley meets “D,” a ghost with no memories who has wandered the island alone for decades since his death.

Ashley tries to help D recover his lost memories while also uncovering the truth about her father, the murder of her mother, and the mysterious project codenamed “Another.”