It's the age-old tale of falling in love with the wrong person. The Ang Lee-directed "Lust, Caution" finds a secret agent (Tang Wei) tasked with killing a Japanese government official (Tony Leung Chiu-wai). But in all her tracking and tracing, she sees another side to her mark. Slowly she falls in love with him and then must decide which to put first — her job or her heart. The forbidden love affair at the centre of this movie grows steamy in its secrecy, making it highly appealing for "Fifty Shades" fans who want more torrid love affairs on screen.