John Cranford is a U.S. customs agent dedicated to stem the activities of a gang of opium smugglers. After successfully closing the case, Cranford takes a vacation on Pidgin Island, near Kingston, Ontario. Here he meets the beautiful Diana Wynne, whose mysterious behavior both fascinates and attracts him. It turns out that Diana is herself a secret service agent, bent on trapping notorious pearl smuggler Michael Smeed.
| Actor | Role |
|---|---|
 Harold LockwoodJohn Cranford | John Cranford |
 May AllisonDiana Wynne | Diana Wynne |
 Pomeroy CannonMichael Smead | Michael Smead |
 Lester CuneoDonald Smead | Donald Smead |
| FFred L. WilsonUncle Billy | Uncle Billy |
 Lillian HaywardUncle Billy's wife | Uncle Billy's wife |
| EElijah ZerrLester | Lester |
| YYukio AoyamaWah Sing | Wah Sing |