A mysterious blonde woman (Brigitte Lin) uses a group of Indians to transport drugs, but the Indians end up botching the job. After killing the Indians, she escapes and encounters undercover detective 223 (Tony Leung Ka Fai), who is heartbroken over a breakup. Meanwhile, policeman 663 (Tony Leung Chiu Wai), also reeling from a broken heart, lingers in a snack shop, catching the attention of the shop employee Afaye (Faye Wong), who sneaks into his home to spy on him...