Emperor Qi (Anita Mui), a fatuous and woman chaser ruler, accidentally runs into a beautiful and charming woman Wu Yen (Sammi Cheng), who is the chief of the Yaksha Mountain stronghold. The two fall in love at first sight and soon made a solemn pledge of love. Thinking that this is a heavenly made match, but out of the blues, a large patch of mole appears on Wu Yen's face, which makes Emperor Qi run away in horror. Actually this is caused by a fox fairy (Cecilia Cheung).The fox fairy forces Wu Yen to make love with her, or she will be ugly for the rest of her life. Although beauty is commendable, love is more valuable and thus the loyal and steadfast Wu Yen refuses the fox fairy's request. This makes the bisexual fox fairy furious, and so she disguises herself as a pretty girl. On the one hand she disguises as a man to arouse Wu Yen's passion, and on the other hand disguises as a girl to seduce Emperor Qi to become unfaithful.The bisexual fox fairy actually do not know what love is, and also finds herself confused. She is wondering whether she now loves Wu Yen or Emperor Qi and thus she now socializes between the two persons......