Chinese crime thriller following former detective Zhang Zili (Fan Liao) as he teams up with his ex-partner in an attempt to solve the case that put an end to their careers. When murders begin to take place similar to those the detectives were investigating several years previously they discover that Wu Zhizhen (Lun-Mei Gwei), a dry cleaners clerk, is the prime suspect as the men she has been romantically involved with have been killed. Despite knowing that Wu poses a threat, Zhang finds himself drawn to her and he, too, becomes involved with the potential killer. Will he be able to solve the case