After his advertising crude ad campaign for "Back Balls" ("The sweetest suck of all!") gets a rather mixed reception from influential businessman Bach (Milan Lasica, I SERVED THE KING OF ENGLAND) himself, womanizing photographer Petr (Tomás Hanák, IMMORTAL BELOVED) and school chum/pompous MP Dohnal (Miroslav Donutil) - who is being pressured by Bach to approve the construction of a ring road on protected land - take a spin out into the country and happen upon stranded motorist Lenka (Zuzana Stivínová). When she refuses to siphon - "suck" would be more to the point - petrol out of Petr's sports car, they offer her a lift instead. They drive her into the woods where Petr restrains her while Dohnal rapes her. As they debate whether to dump her or kill her to avoid scandal, Lenka feigns amnesia and asks for a lift home. When she asks them in for a drink, Dohnal accepts the invitation out of convention but also suggests Petr might get a chance to have a go at her; however, veterinarian Lenka drugs the two men and surgically removes their testicles.

While such an outrageous act would be the climax of your typical rape-revenge movie like I SPIT ON YOUR GRAVE, TRAPS - from Czech cinema provocateur Vera Chytilova (DAISIES) - stages Lenka's revenge at only thirty minutes into this two hour film. What follows is an exploration of the traumas suffered by the three "victims". It is a blackly comic role reversal for the two rapists, with Petr unable to escape being ravaged by his many women (including Bach's nymphet daughter [Katerina Hajna] who thinks he is a sensitive soul and wants to marry him when he fails to commit suicide) for whom he cannot get it up, with the bawdy Bach Balls campaign a constant reminder of his lost manhood. Dohnal tries to conceal the the nature of his injury from the public (and the circumstances of it from his wife) amidst whilst enduring sight gags involving eggs, offal, and chainsawed tree branches as well as remarks about eunuchs, castrati, and the throwaway insults like "useless fucker" from his detractors.

Lenka, on the other hand, is still traumatized and now fears retribution from her attackers for her act and to keep her quiet (more so when she learns that Dohnal is an MP). Her boyfriend Michal (Lubos Svoboda) "forgives" her for being raped, but then puts it to strategic advantage with the help of Lenka's reporter friend Anna (Eva Holubová) to blackmail Dohnal into quashing the ring road project. The blackmail makes Dohnal and Petr - who has become engaged to Ingrid and is seeking the help of doctor friend Marek (Karel Roden, ROCKNROLLA) for the wedding night - even more eager to silence Lenka. The ending is as cynical as it is perhaps realistic; and that perceived cynicism and the vulgarity of the subject matter is what turned some critics off from this latter day Chytilova effort, especially Western critics who wanted to label her a feminist.