<p>Severalyoungcouplestraveltoaprivateislandforamysterioustrainingretreatthatpromisestostrengthentheirrelationship.However,duringtheRetreat,theheroesencounteranancientdemon-aSuccubus.Thismonsterfeedsonthelifeenergyofpeople,takingonsomeoneelse'sappearanceandprovokingvictimstoshowtheworstqualitiesanddoterriblethings.</p>
