An Alaskan mission priest gets involved in a tale of revenge and the search for a shipment of gold bars stolen off a historic paddlewheel steamboat, the Nenana. Fr. Hardy and his friends, Evie, Andy and William, board the Nenana on her last voyage down the Tanana and Yukon rivers. There's already been one unsolved murder, death by paddlewheel. Can they get to the bottom of it all before there's another?