A curious group of eight women challenge themselves with the masturbation device 'Fuck Machine'. They attach a large dildo to its mechanical workings, turn on the switch, and watch as the precise piston robot repeats the same movements over and over again! The girls prepare by generously applying lubricant to their bodies and nervously insert the cyborg penis into their own vaginas. As they become more comfortable, they gradually increase the speed of the machine until they reach climax. Note that the contents may vary depending on the distribution method.