The Killer is a 1989 Hong Kong action film directed by John Woo, and produced by Tsui Hark. The film stars Chow Yun-fat, Danny Lee, and Sally Yeh. Chow plays Ah Jong, a professional assassin for the Triads who wants to retire, but accidentally damages the eyes of singer Jennie (Yeh) during a shootout and sets out to perform one last hit to pay for her treatment.

Plot

Ah Jong, a hitman, decides to retire after one final job. During a shootout with gangsters, he accidentally blinds a young nightclub singer named Jennie when his gun fires too close to her eyes. Over the next six months, he quietly watches over her, attending all of her performances. One night, he intervenes to save her from being mugged and assaulted; Jennie then invites him into her apartment. They grow close and begin a relationship. However, Jennie then learns from her doctor that if she does not undergo a corneal transplant, she will lose what remains of her sight. Ah Jong agrees to kill a high-ranking triad boss to pay for the operation.