As Napoleon Doble, Dolphy trades in his customary secret agent badge for one with the NBI. The film opens in wham-bam style, with Napoleon shooting it out with machine guns as his nemesis Elias (also Dolphy, much-gnarled but, under the latex buboes, still recognizable) robs a bank and makes a hasty getaway. The Thirties gangster-style car crashes and somehow Elias drags the stolen loot back to his mansion hideaway, where Girlfriend Number One (Lucita Soriano) and his trusted scientist-slash-plastic surgeon (Carlos Diaz) perform a face-changing operation - under strict orders to make him look JUST like Napoleon Doble. Elias, the dark Hyde to Dolphy’s likable Pinoy Everyman, is a hoot: cold, calculating slits for eyes and a sardonic smirk, and with a harem of five girlfriends on call, all top-shelf Pinoy starlets who are forced to line up and have their cocktail frocks ripped down in one of Elias’ cleavage inspections! Not content with merely a Foxy Five, Elias decides to recruit a sexy Sixth, and as fate would have it, stalks the gorgeous Anna (Lourdes Mendel), a dancer at his own nightclub - and, the same girl courted by Napoleon. Anna, of course, only has eyes for the REAL Napoleon, yet Elias is undeterred, and takes her refusal to bare her cleavage as a sign she’s the new Number One Girlfriend, a position jealously fought over by the Sexy Five in a messy, drunken, all-in catfight. A complicated web of mistaken identities - that old hackneyed comedic standby! - ensues, with Elias stealing NBI files while posing as Napoleon, and ends with Napoleon and Anna trapped in a cell in Elias’ mansion at the mercy of a leering, power-hungry and clearly insane Elias.