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.

Reparto

Harold Lockwood

John Cranford

May Allison

Diana Wynne

Pomeroy Cannon

Michael Smead

Lester Cuneo

Donald Smead

Fred L. Wilson

Uncle Billy

Lillian Hayward

Uncle Billy's wife

Elijah Zerr

Lester

Yukio Aoyama

Wah Sing