Police know very well Ha is behind the crime syndicate smuggling and trafficking in drugs. Police also know Ha keeps every details of his criminal transactions in a book which is kept by his mistress. Plainclothesmen Beethoven and Achioo are ordered to investigate and crack Ha's crime empire. They get around to the mistress's hideout but find she is dead, plus that they eliminate all fingerprints by six-thumbing around. Luckily, they are helped along by beautiful woman Inspector Anna, who has a secret crush on Achioo. Finally the two make their arrests and become instant heroes. (Joy Sales)