Sgt. Derry Conniston (Dennis Morgan) catches escaped prisoner John Keith (also Morgan), but in the process the lawman sustains an injury that will soon cause his death. Before Derry dies, he comes to believe that John -- who is his virtual twin -- is innocent. Derry encourages the refugee to borrow his identity and clear his name. With help from pal Andy (George Tobias), he tries to do so. But an encounter with Derry's sister, Linda (Elizabeth Earl), complicates things.