Fulltime Killer is a 2001 Hong Kong action film produced and directed by Johnnie To, and also written, produced and directed by Wai Ka-fai, and also produced by and starring Andy Lau. Based on a book by Hong Kong filmmaker Pang Ho-cheung, Fulltime Killer protagonist O is a hitman being challenged by new hotshot Lok Tok-wah. O has lived a life of seclusion as the number one hitman in Asia. The woman living at his contact address is captured after O foils a set-up by his boss. He then goes on the run whilst trying to fend off his adversary.