A U.S. Marshal warns Sergeant Preston of stolen goods coming across the border, and that the smugglers are suspected murderers. He then comes across the smugglers' cache in an old mine drift.; A young boy has escaped from two bush tramps and furthieves, and tells Preston that his father is still tied up on the sled driven by the tramps.; Ole Olsen is framed for the killing of his friend Sven Svenson.; Gray Wolf steals fish from an angry bear.