Elena and Adam are housesitting in Wimbledon and are instantly seduced by their new upscale surroundings. Sophia and Finn are their beautiful, enigmatic neighbours who invite them into their world. When Sophia proposes a wicked game to Elena whereby they will swap partners in secret, it's not long before Elena starts to experience a sexual awakening that blossoms into an illicit love affair. But Sophia's plans are far more complex and dangerous than Elena could ever have imagined. Who will survive?