 Having grown up in an orphanage, Mathias is shocked to discover that his mother has only recently died and that he has a twin brother, Thomas. He also learns that he and his twin brother were together until the age of six when Mathias was placed in the orphanage but Mathias has no recollection of this early period of his life. As he spends time with his new-found sibling, Mathias becomes more and more troubled and some of his memories are coming back to him ...