Mr Wong (Boris Karloff) is enlisted by his friend Police Captain Street (Grant Withers) to find the killer of his old friend who was found fished out of the waterfront in San Francisco whilst investigating a smuggling ring.
Harry "Hardway" Lockett (Frank Puglia) is something to do with the smuggling ring which involves his club, the Neptune. Helping (or is that hindering?) is reporter Bobbie (Marjorie Reynolds) who has a fractious relationship with Street...
It is an enjoyable murder mystery it starts off quite slow and formulaic but things perk up when the bodycount starts rising. An early remote control (for a radio) also becomes a very interesting technological plot device. The story is quite average but what raises the film above the average of Karloff of course.