
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