1930s Shanghai: the glamorous, tumultuous "Paris of the East" whose salons, streets and bedrooms frame this Chinese adaptation of the French novel Les Liaisons Dangereuses. Aging socialite Mo Jieyu (Cecilia Cheung) still finds herself circling ex-boyfriend Xie Yifan (Jang Dong-kun). Even after years of separation, their attraction--and appetites--burn just beneath the surface. Mo, the rich and charming widow with a taste for indulgence and sensuous pleasures, still has eyes for famous womanizer Xie, who secretly burns with love for her. And yet, in his luxurious life, Xie's new interest lies in chaste humanitarian Du Fenyu (Ziyi Zhang), who has captured his attention and earned his desire for conquest. Mo lures Xie into a treacherous, dangerous game of hearts: win, bed, and leave Du, proving his mettle as a rogue and impossible catch. But can Xie take the honor of such a woman, without losing his own heart, as well? As war looms in Shanghai, can Xie win Mo's seductive game? Can he choose between these two women? Where will such a triangle lead them all? In matters of the heart, and in this city, there may be no difference between love and war.