Al Levitzsky is Dan McCord, Private Investigator, hired to find a mysterious young woman named Susan. But wait a minute...he just had a one-night stand with a girl who sounds exactly like this Susan, and she gave him the wildest sex imaginable. McCord investigates, locates the people whose lives have been touched by Susan, and flashbacks show the viewer the incredible group sex the young nymphet inspired. She comes into people's lives, changes them forever, and then disappears.