In the 1st, the Professor has developed a device for highly improving sex and implanted it in Eva Robin's rod. The ring this guy gives her is a remote control. Off Eva goes to try this outside the laboratory. Ajita assents to go with Eve to prove that the effects work just as well for honeys as they do for fellows. However, an unmerciful baron, who is impotent has heard of this and wishes it for himself. Thus his attempt to kidnap Eve and retrieve the device with an axe. His domme is trying to receive the device herself, but with the intention of selling it off to the highest bidder.