In 2046, directed by Wong Kar-wai, the narrative unfolds through four pivotal story arcs, presented in a non-chronological manner that reflects Wong’s distinctive style. Although familiarity with Days of Being Wild and In the Mood for Love enhances the viewer's experience, it is not required to grasp the intricate themes of this film.
After a prolonged stay in Singapore, Chow returns to Hong Kong, now transformed into a charming womanizer, all in an effort to mask his emotional turmoil stemming from his loss of Su. During this time, he encounters Lulu, taking her back to his home, but he inadvertently keeps her room key. Unfortunately, when he later returns it, he learns the shocking news that Lulu was attacked and stabbed the previous night by a jealous boyfriend.
The storyline shifts to Jing-wen, the landlord's daughter, who is involved with a Japanese man that her father vehemently disapproves of. This relationship soon comes to an end as Jing-wen decides to part ways. Following her, Jing-wen’s younger sister, Jie-wen, attempts unsuccessfully to seduce Chow. Facing increasing financial strains, Chow turns to writing science fiction stories where characters resembling those from his life begin to appear, weaving their narratives into the main storyline.
Meanwhile, Bai Ling, a dancer at a nightclub, is on a quest for a meaningful relationship. After encountering Chow—who is adjusting to being single post-breakup with his girlfriend—she becomes friends with him. However, as their connection deepens into something more physical, Chow expresses his desire to keep things casual, while Bai admits her burgeoning feelings for him and seeks a more committed relationship. When Chow rejects her request for exclusivity, their paths diverge, and Bai returns to a life of prostitution.
In the aftermath of Bai's departure, Jing-wen emerges from a period of institutional care still affected by her prior relationship. Chow finds himself drawn to Jing-wen, attempting to cultivate a bond, but she remains emotionally tethered to her ex-lover, preventing anything from developing between them. Eventually, Jing-wen announces her engagement, leaving Chow despondent. In his sorrow, he encounters Bai Ling again, reflecting on their shared experiences as he resolves to move on from Su.
The timeline progresses, and Bai reaches out to Chow, inviting him out for dinner the night before her departure to Singapore. During this meeting, she hands him a stack of cash—each bill symbolizing a night spent together—before expressing a desire to reconnect and share one last evening with him. However, Chow, overwhelmed by his emotions, declines her request and departs.
As the narrative unfolds, Chow's journey takes him back to Singapore, where he meets a new woman named Su (distinct from Su Li-Zhen), who offers to help him with his financial struggles arising from gambling. Their ensuing romance is marked by complications, with Su ultimately challenging him to a game that results in Chow's loss, leaving her unwilling to leave with him. Chow later finds himself searching for her, only to face the grim reality of her fate as rumors swirl regarding her possible return to Cambodia or a far worse end.
The film's conclusion echoes the sentiments of lost opportunities and the complexity of human relationships, portraying Chow's emotional endeavors as he grapples with his feelings of love, loss, and the passage of time.