Harry, a homespun private eye, and his wife Cardamine, a psychic advisor, are thrilled as they prepare to journey overnight by train to the Queen City World's Fair. But thrills become chills when someone is murdered in the sleeper compartment next to theirs. Motives abound and everyone on board is a suspect. It's up to Harry to track down this killer. Will he make the grade? Or get derailed? Come aboard and find out, if you dare.