Having two wealthy married psychologists in the family, who have an endless sex drive and devious taboo-slanted inclinations, can lead to some interesting scenarios. Such is the beginning as Penny Barber and hubby Jack Vegas, after a romantic romp following a sexy soak in an elegant tub, leave their mansion to their stepkids when they take off for a vacation. This is perfect for a small party as the youngins (Theodora Day and Tyler Cruise) invite another couple, Coco Lovelock and Joshua Lewis (also stepsiblings) over for what winds up being an experimental moment for Lovelock as Day first tries—hard—to find out if she has any lesbian urges. When that fails, the stepsiblings swap partners for a free-for-all.

Things get a bit emotional as the parents of these teens split off and swing a bit themselves; then the teens, empathetic of their respective step-parents' wanton ways, wind up with the other parents so just about every swapping possibility is covered. 

In between the scenes are lecherous psychological sessions, but the big thing is the finale, where everyone, wearing masks that honestly do little to conceal their identities, gets together for a fancy ball that quickly evolves into a masked group orgy where four couples get it on as a half dozen like-attired spectators watch.