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.

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...—Rod Crawford <[email protected]>

A young Chinese woman has come to see famed San Francisco private detective James Lee Wong at his home, but before Wong can meet with her, he finds her dead body in his library, she having been shot probably from his open window with a poisoned dart. After calling in his friend Inspector Bill Street with the SFPD, they discover that she, recently arrived from China, is Princess Lin Hwa. The only initial clue as to why she came to see Wong and/or who killed her is a note scribbled with her dying hand only with the words "Captain J". To figure out who murdered the Princess, Wong and Street will look into the reason for her being in San Francisco, her rather secretive and less than luxurious, seeing as to her station in society, mode of transport to the US, and her life in Chinatown, where she was living, since her arrival in San Francisco. Complicating the investigation is Roberta Logan, Bobbie in casual circumstances, a reporter out for the big story and Street's sometime girlfriend, he who finds her more of a nuisance than a girlfriend. But she could be more of an asset than hindrance to the investigation in she long having been aware of the Princess' arrival into the US before Wong and Street even knew of such a person.—Huggo