London, New Year's Eve. Snow falls on a Georgian mansion, vibrating with the festivities of an eighteenth-century themed masquerade ball within. Middle-aged divorcee Anna stands alone, mourning her youth until the clock chimes midnight and a mysterious masked figure kisses her on the mouth. Thus begins a heady dance of seduction charged by other clandestine romances swirling around them, whipping the ball into an erotic frenzy of operatic proportions until the night climaxes, revealing unease beneath the glitter.