Toby is a happy-go-lucky charmer who is celebrating with friends when the night takes a turn that will change his life: he surprises two burglars who beat him and leave him for dead. Struggling to recover from his injuries, he takes refuge at his family's ancestral home to care for his dying uncle Hugo. Then a skull is found in the trunk of an elm tree in the garden. As detectives close in, Toby is forced to face the possibility that his past may not be what he has always believed.