The Butterfly Lovers, also known as The Assassin's Blade or Jiandie, is a 2008 Hong Kong film directed by Jingle Ma and starring Wu Chun, Charlene Choi, and Hu Ge. It is based on the Chinese legend of the Butterfly Lovers, but in a wuxia setting.

Plot

The movie begins with an explanation of the legend of the Butterfly Lovers. Zhu Yanzhi disguises herself as a man to go to Soul Ease Clan, which she must do to learn fighting skills which will help protect her family. While there she meets Bro Shan who protects her and calls her Little Bro, unaware that she is a woman. She has a love of butterflies and decorates Bro Shan's sword with two butterflies. At first Bro Shan is angry at Yanzhi for drawing butterflies on his sword but eventually accepts it. The pair develop a close friendship. Bro Shan eventually realizes that Yanzhi is a woman and makes a butterfly pin for her. Eventually, Bro Ma, Yanzhi's childhood friend comes to pick her up and take her back to her family. Yanzhi is pleased that she will be going home but says she will miss Bro Shan, who she is now in love with. Before she leaves, Bro Shan takes her to Butterfly Valley, a beautiful grassy green field where hundreds of butterflies fly.