The Mantle brothers are both doctors - both gynecologists - and identical twins. Mentally however, one of them is more confident than the other, and always manages to seduce the women he meets. When he's tired of his current partner, she is passed on to the other brother - without her knowing. Everything runs smoothly, until an actress visits their clinic, and the shy brother is the first to fall in love. Will they be able to 'share' her ?

Darryl Revok is the most powerful of all the scanners, and is the head of the underground scanner movement for world domination. Scanners have great psychic power, strong enough to control minds; they can inflict enormous pain/damage on their victims. Doctor Paul Ruth finds a scanner that Revok hasn't, and converts him to their cause - to destroy the underground movement.