A pretty Chinese woman, seeking help from San Francisco detective James Lee Wong, is killed by a poisoned dart in his front hall, having time only to scrawl "Captain J" on a sheet of paper. She proves to be Princess Lin Hwa, on a secret military mission for Chinese forces fighting the Japanese invasion. Mr. Wong finds two captains with the intial J in the case, neither being quite what he seems; there's fog on the waterfront and someone still has that poison-dart gun...
as Mr. James Lee Wong
as Roberta 'Bobbie' Logan
as Police Capt. Bill Street
as Mr. Davidson
as Capt. Guy Jackson
as Capt. Jaime
as Police Sgt. Jerry
as Princess Lin Hwa
as Willie
as Lilly May
as Bailey
as Palisser Hotel Clerk
as Sgt. Brady
as Taxi Driver
as The Coroner
as Aged Tong Member
as Police Officer at Explosion
as Mute Dwarf
as Police Commissioner
as Tong Chief
