A con man with his beautiful accomplice and a hostage steals a half million dollars worth of diamonds but finds they're all lost in the desert without water.

While Joel and his older ship's captain brother Mark are at sea, the latter is abandoned in Singapore by devious ship's mate Finch who, upon their return, convinces the townspeople that Joel abandoned his brother. Joel, determined to not only find Mark but to see justice done, returns the ship to Singapore.

A chemical manufacturer is killed just after asking detective James Wong to help him. So Detective Wong decides to investigate this as well as two subsequent murders.

Shipping magnate Cyrus Wentworth, downcast over a disaster to his ocean liner 'Wentworth Castle' (carrying, oddly enough, an illicit shipment of Chinese bonds) is shot in his office at the very moment of kicking out his daughter's fiance Dick Fleming. Of course, Captain Street arrests Dick, but reporter Bobbie Logan, the attractive tho...

Detective James Lee Wong must find the "Eye of the Daughter of the Moon," a priceless but cursed sapphire stolen in China and smuggled to America. His search takes him into the heart of Chinatown and to the dreaded "House of Hate" to find the deadly gem before it can kill again.