Iris finds a box beneath her apartment floorboards that should not exist, each letter inside written in her own hand. The first warns her to stop looking. The next tells her to meet a ferryman at a pier that was destroyed years ago. Drawn into a world made of forgotten choices and sealed memories, Iris discovers she once split herself between two paths, two lives, two versions of reality. Guided by letters she once wrote and a key to a lighthouse that keeps lost time, she must face the self she abandoned and the pain she buried. To become whole again, Iris will have to remember everything she tried to forget, even the things that broke her.