One rainy night, the body of Katy Lok, the only daughter of Macau Judiciary Police Detective Squad’s Inspector Yin Lok, is found in the wild. Based on the semen and DNA sample found in her body, the police arrest Manny, Katy’s classmate.
Having quietly left the police after his daughter’s death, Yin thought that the case is closed. But one month after Manny is sent to prison, several more girls are brutally murdered in Macau. Yin begins to suspect that his daughter’s killer is still out in the world.