In psychedelic swinging 60s style, the dreaded thief Diabolik wreaks havoc on a generic European country for his own financial gain and amusement. He shares an extravagant underground lair (and a giant bed of money) with his curvaceous, beautiful girlfriend...who uses her awesome powers to help Diabolik foil gangsters and steal billions from the government. As the anti-hero of the film, Diabolik must face off against bumbling cops and revenge-seeking mafiosi.