Libido starts with the simple, unpretentious life of the couple Corazon and Abner who manage the family farm. The complication in their lives began with the arrival of Corazon's sister Jacinta and husband Bobby. The minute Jacinta sets eyes on Abner, and Corazon on Bobby, two promiscuous affairs happened. This tale of partner swapping, homosexual encounters and other occurrences may prove mind boggling to many. How will these affairs affect the lives of two couples?