On a chilly Halloween night, Elias and Lily, step siblings, find themselves drawn into a supernatural pact that swaps their bodies and desires. As Elias awakens in Lily's teenaged form, he's greeted by a raging hard-on and an insatiable urge to fuck. Meanwhile, Lily, now in Elias's body, is overwhelmed by his massive cock and a newfound hunger for pussy. Together, they invite their friends Oliver and Angel for a terrifyingly kinky foursome, trading partners and bodies with each thrust, as the night's spooky magic drives them to new heights of taboo pleasure.