Lieutenant Giovanni Drogo is assigned to the old Bastiani border fortress where he expects an imminent attack by nomadic fearsome Tartars.
Two outlaws compete with each other over a treasure map that will lead them to buried gold while one of them is in league with a sadistic priest-turned-crime lord, while a young Native American girl helps both outlaws and plays both sides against each other.
A liberal-thinking author watches his wife as she attempts to seduce his best friend at a dinner party. She ends up taking on another man as well, and the writer has an affair with the another dinner guest. Soon the three men and two women are entangled in a confusing series of partner-swapping sex sprees where everyone's morals are challenged in the wake of the sexual revolution.
