A very clever giallo from Spanish director Ramn Fernandez. Federico (Jean Sorel) is married to a rich woman named Monica (Nadiuska ) and has used her money to start a successful company. His female partner Elena (Karin Schubert) is using her own lesbian lover Eva (Barbara Rey) to seduce him into affair and break-up the marriage all in an elaborate plot to take over the company. At the same time Federico is being blackmailed by a recently-paroled felon from his past (he was once a criminal and con artist). Monica is attacked by who she thinks is the blackmailer and kills him in self defence. But the corpse disappears and so starts a complex game of double dealing and murder that leads her to the edge of madness. This is a great quality print in Spanish with English subs.