Taiwan, 1980s. A hot summer day, watermelon juice, and celluloid dreams fuel 15-year-old Ming's sexual awakening.
On his 18th birthday, Jan Wen shoots randomly at the crowds in a night market for unknown reasons. The tragic incident causes a strong impact on the lives of his family and friends, the victims and the witnesses. However, if there was a chance for them to make different choices, would the tragedy still happen? Will it be a different outcome if they all changed their behaviour at the crucial moment?
Police officer Chou is about to propose to his girlfriend Chen. He then receives a homicide case report and follows it to the mountain area. Sadly, the deceased is his girlfriend Chen. Devastated as he is, he tries his best and arrests the murderer Li. However, from Li's confession, Chou learns that Chen has voluntarily let Li kill her. Why do Li and Chen go on a murderous journey together? Or is it Chen who kills herself?