SPL: Sha Po Lang (released in the United States as Kill Zone) is a 2005 Hong Kong action film written and directed by Wilson Yip, and starring Donnie Yen, Sammo Hung and Simon Yam. The film was released in Hong Kong on 18 November 2005. It was followed by SPL 2 in 2015, and Paradox, released in 2017. The title Sha Po Lang refers to three words derived from Chinese astrology that each represent a different star capable of good or evil depending on their position in the heavens.
Chan, an articulate senior detective nearing the end of his career, is taking care of the daughter of a witness killed by ruthless crime lord Po. Martial arts expert Ma is set to take over as head of the crime unit, replacing Chan who wants an early retirement.
A Hong Kong cop named Kit busts a major gangster only to find his cover blown and his main witness gone. The gangster, in retaliation, has him kidnapped and put in a Thai jail with a false criminal identity. Lowly prison guard Chai, with his extraordinary fighting skills, guards Kit and prevents his escape. The prison guard’s daughter suffers from a rare form of leukemia and Kit is the only donor who can save her. The prison guard discovers Kit’s real identity and helps him to escape in return for his agreeing to save his daughter. Together, Kit and Chai must face and take down the gangster and his minions.
When a Hong Kong police negotiator is informed about the sudden disappearance of his 16-year-old daughter in Thailand, he travels there to search for her whereabouts.
