Senior Forensic Chemist Ko On from the Forensic Science Division, Senior Forensic Pathologist Man Ka-hei from the Forensic Pathology Division, and Senior Inspector Kwok Fai-wong from the Kowloon West Regional Crime Unit, formed a crime-solving triangle with their professional teams. The childhood regrets of hot-blooded reporter Chris Tsui were closely related to Ko On, Scientific Evidence Officer Shui Wai-ming became a murder suspect upon her boyfriend’s betrayal, police elite Ko Ching persistently investigated the truth of her sister’s abduction. The crime-solving triangle firmly believes that good always triumph over evil and fights for justice.