Back before World War II, Steve Payne was the third mate of an old tramp steamer ...
Skipper Steve Payne makes a living cruising the waters off the Chinese coast. After saving the life of a man called Ying Ko, Payne himself gets rescued years later by the now turned "pirate king" Ying Ko.
Identical twins Peter and Paul Leverett are going to meet again after a ten-year separation. A rival steps in and kills Paul, sending Peter into (by twin-magic) a coma and summoning the local sheriff. Investigation of Peter's coma leads to the detection of Paul's murder.