Rookie police officer Will Yam, portrayed by Mason Lee, has just graduated from the police academy and is eager to prove himself on the streets. However, his initial assignment quickly turns complicated when he is teamed up with the seasoned officer Cham Lau, played by Gordon Lam, who has recently been reinstated after facing controversy. The duo finds themselves entangled in a string of serial killings that are terrorizing the city, but rather than making progress, their efforts inadvertently lead to a cascade of unfortunate events.

As the plot unravels, Cham faces his own demons when he unexpectedly crosses paths with Wong To, a drug-addicted street urchin portrayed by Cya Liu, who is hauntingly linked to his tragic past where she was involved in a fatal incident affecting Cham’s family. Cham’s growing rage leads to a troubling spiral of violence and abuse directed at Wong, showcasing his internal turmoil.

Adding to the drama, Will’s clumsy mistake of misplacing his firearm results in it falling into the hands of the very serial killer they are trying to apprehend, escalating the tension and urgency in their investigation. With the killer now able to move freely in the shadows, a chilling crisis looms ever closer.

Filming for Limbo commenced in September 2017 across various locations in Hong Kong, particularly in To Kwa Wan and Kwun Tong, known for their rich historical architecture. Significant scenes, including a dramatic rooftop fight between officers Cham Lau and Hiroyuki Ikeuchi, were uniquely choreographed, with both actors losing substantial weight to authentically portray their roles. Notably, a memorable scene was filmed on Gordon Lam’s birthday as he navigated a garbage chute in search of crucial evidence.

Limbo made its world premiere at the prestigious 71st Berlin International Film Festival, held virtually in March 2021, and was later recognized at the 23rd Far East Film Festival where it won the esteemed Purple Mulberry Award. Upon its release in Hong Kong on November 18, 2021, the film achieved a noteworthy gross of HK$740,238 within its first four days, marking a strong debut.

Critics have lauded the film, with Lee Marshall from Screen Daily highlighting director Cheang Pou-soi’s profound “dystopian vision of an Asian metropolis grappling with a political and social identity crisis,” while Jessica Kiang from Variety praised the film’s masterfully choreographed action sequences complemented by the spectacular cinematography of Cheng Siu-Keung.