While two teenage siblings named Yuki and Yoko are on summer vacation, they discover a girl with no memory of her past what so ever, whom they decide to call Faye. Not long from this event, they learn the truth about them and their parents. To find Faye's memories and information about their family. Soon, they meet a mysterious man in a red hooded trench-coat that apparently is after this girl for unknown reasons. What will become of them in their adventure of action, humor, tragedy, mystery, and romance. What what happen in the Forbidden woods.