Killer's Romance, also known as Romantic Killer, is an action film that tells the story of Jia, a peaceful and happy college student studying in England. Her life takes a drastic turn when she accidentally witnesses killer Wang Zhuang killing an old man. She becomes embroiled in the violent world of triads and organized crime groups, which changes her life forever. When Wang again kills a local gang leader in Chinatown, he runs into Jia once more. The authorities discover that Jia seems to know Wang well.