A charlatan by trade, "Doctor" Durbin Entwhistle wins himself a mysterious box from a nervous man in a rigged card game. Though unable to open his new prize, Durbin is certain it contains something truly valuable. He doesn't know how right he is. While the good doctor seeks a way to open his box, numerous parties converge around him hoping to steal it for themselves. Even if it means killing Dr. Entwhistle.