Ding Hui is a member of Purple Butterfly, a powerful resistance group in Japanese occupied Shanghai. An unexpected encounter reunites her with Itami, an ex-lover and officer with a secret police unit tasked with dismantling Purple Butterfly.
| Actor | Role |
|---|---|
 Zhang ZiyiCynthia / Ding Hui | Cynthia / Ding Hui |
 Liu YeSzeto | Szeto |
 Feng YuanzhengXie Ming | Xie Ming |
 Toru NakamuraHidehiko Itami | Hidehiko Itami |
 Li BingbingTang Yiling | Tang Yiling |
| KKin EiYamamoto | Yamamoto |
 Leni LanAh Zi | Ah Zi |
 Yao AnlianNot listed | Not listed |
 Wang KaiBrother | Brother |