Hangzhou, China, the present day. Chen Congming, an associate professor at a medical college who is popular with his students, alarms his superiors with his theory that everyone has the potential to go crazy, and that the dividing line between sanity and insanity is paper-thin.
| Actor | Role |
|---|---|
 Zhang JingchuNot listed | Not listed |
 Wang LuoyongNot listed | Not listed |
 Yuan WenkangNot listed | Not listed |
 Deng JiajiaNot listed | Not listed |
 Ren QuanNot listed | Not listed |
 Kong WeiNot listed | Not listed |
 Annie Shizuka InohNot listed | Not listed |
 Daniel Chan Hiu-TungXiao Chunlei | Xiao Chunlei |