CC Lowsley is in a frenzy with preparations for Great Slaughter Amateur Dramatic Society's upcoming production. Drama and reality soon blur however when leading actor is killed by the leading actress during rehearsals.

It's Christmas and Britain is in the grips of the worst winter on record. When a precious jewel is stolen from a snowbound train, the crime-solving nun turns passenger to detective - uncovering murder, ancient curses and dark family secrets.