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...