Taipei, Taiwan, the present day. While training in a park one night, high-school student and talented marathon runner Ma Chun-an, nicknamed "Cool Ma" (Sean Huang), is viciously wounded by androgynous punkette Wang Yu-tang (Jin Cheng) when she mistakes his attempts to save her in a confused teenage brawl as an attack on her. To the grief of his working-class mother (Ku Ming-shen), who raised him alone after his father's early death, Ma subsequently dies in hospital and discovers he has turned into a wraith who can only be seen and heard by Wang. Truculent, and confused over her gender, tomboy Wang constantly argues with her wealthy, conventional parents (Ai Wei, Fu Chuan), who had always wanted a son, and only reluctantly agrees to help Ma communicate with the outside world. But as the two get to know each other, and to help atone for her mistake, she finally agrees to train as a marathon runner under Ma's coach Liu Chuan-yi (Blue Lan), despite the fact she's dropped out of school. Liu is under pressure at the high school for allowing juvenile offenders to train in his team, and has to make a good showing at a forthcoming marathon race. And Ma's mother, still full of hatred for Wang and her family, has hired a private detective agency to follow her, hoping to influence her probation process.
Source: Film Business Asia