The humid air of the Qin Dynasty hangs heavy, centuries away from the world it left behind, yet the past is far from peaceful. Twenty years of quiet seclusion for Hong Siu-lung and his family have been shattered. The chilling glint of advanced weaponry, a stark echo of his own time, pierces the ancient sky as an ambush erupts, not on some nameless foe, but on the very figure Hong once guided – the formidable Qin Emperor, portrayed with chilling authority. Now, with the empire united and victory within reach, the Emperor’s reign is threatened by ghosts from the future, forcing Hong, alongside the determined Emperor and the formidable warrior Princess Chiu Sin, and the trusted general Ken, to confront a history they both desperately tried to bury. The fate of tomorrow hinges on their ability to finally settle the score with yesterday.

Back to the Past Movie Overview
| Title | Back to the Past |
|---|---|
| Release Status | Released |
| Release Date | 2025-12-31 |
| Runtime | 1 hours and 47 minutes |
| Genre | Science Fiction, Action, Comedy |
| Original Language | Cn |
| Spoken Language | Cantonese |
| Country | Hong Kong, China |
| Production Co. | One Cool Films, Huace Pictures, China Star Movie Limited, Big Honor Entertainment |
Back to the Past Movie Cast
| Name | Character |
|---|---|
| Louis Koo | Hong Siu-lung |
| Raymond Lam Fung | Chiu Poon / Ying Ching/Chun Wong |
| Bai Baihe | Galie |
| Jessica Hsuan | Wu Ting-fong |
| Sonija Kwok Sin-Nae | Chun Ching / Kam Ching |
| Joyce Tang Lai-Ming | Sin-yau |
| Michael Miu Kiu-Wai | Ken |
| Louis Cheung | 石頭 |
| Kevin Chu | 項寶兒 |
| Wu Yue | Max |
| Timmy Hung Tin-Ming | Phill |
| Chris Collins | Tim |
| Liu Kai-Chi | 乌有博士 |
| John Tang Yat-Kwan | 李小超 |
| Michelle Saram | Princess Chiu Sin |
| Jimmy Au Shui-Wai | 陶方 |
| Wong Man-Biu | 滕翼 |
| Power Chan Kwok-Pong | 李斯 |
| Calvin Choi Yat-Chi | 萬良 |
| Fish Liew Chi-Yu | 聞桑 |
| Sammy Hung Tin-Chiu | 武樹 |
| Tsui Ho-Cheong | |
| Ng Wing-Sze | |
| YU | |
| Andrew Chan | |
| Edward Chui Wai-Tung | Tim |
| Ocean Hsiung | |
| Crz To | |
| Hedi He Guoxuan | |
| Belinda Yan |
Back to the Past Movie Storyline
Twenty years after time-traveling warrior Hong Siu-lung Louis Koo sought refuge from the chaos of ancient China, his hard-won peace is shattered as his former disciple, now the formidable Qin Emperor Raymond Lam Fung, finds himself ambushed by unknown assailants wielding advanced weaponry clearly from Hong’s own era. The Emperor, on the cusp of unifying the warring states, is blindsided by an attack that hints at a conspiracy reaching far beyond his kingdom. Drawn back into a conflict he thought he’d escaped, Hong must once again confront his past, not only to protect his secluded family, including his wife Wu Ting-fong Jessica Hsuan, but also to safeguard the very fabric of time. As the Emperor, driven by a desperate need for control, seeks to understand the origins of the advanced arms, and perhaps uncover a betrayal within his own ranks, he finds himself reluctantly allied with the man who once taught him everything. The mysterious attackers, led by shadowy figures whose motives remain unclear, unleash a whirlwind of futuristic combat across the Qin Dynasty, forcing Hong and the Emperor to combine their disparate skills and overcome their deep-seated distrust. With Princess Chiu Sin Michelle Saram caught in the crossfire and the fate of the future hanging precariously in the balance, Hong Siu-lung must decide if he can truly reconcile with his past to save it from a threat he helped create.
Back to the Past Movie Details
In the epic science fiction action-comedy Back to the Past, audiences are transported to the tumultuous Qin Dynasty where the legendary time-traveler Hong Siu-lung, portrayed by the formidable Louis Koo, has sought a life of quietude with his family for two decades. However, his peace is shattered by the ever-watchful eye of his former disciple, now the powerful Qin Emperor, played by Raymond Lam Fung. On the precipice of consolidating his dominion over the warring states, the Emperor finds himself ambushed by a phantom force armed with advanced weaponry that bears an uncanny resemblance to Hong’s own era. This shocking turn of events forces Hong and the Emperor, whose past is fraught with unspoken conflict, to unite once more. With the very fabric of the future hanging in the balance, they must confront their history and forge an uneasy alliance to thwart the mysterious invaders. The film masterfully blends high-octane action sequences with moments of levity, exploring themes of destiny, loyalty, and the enduring consequences of one’s actions across time, promising a thrilling cinematic journey as directed by Ng Yuen-Fai and Jack Lai.
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Back to the Past Movie Poster Images
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Movie Trailers
UK Audience Reaction
Louis Koo invites UK & European audiences to experience BACK TO THE PAST on the big screen!
Back to the Past Movie FAQs
What is the movie Back to the Past about?
Back to the Past is a science fiction action comedy about a time traveler named Hong Siu-lung living in seclusion in the Qin Dynasty. His peaceful life is disrupted when his former disciple, now the Qin Emperor, is attacked by individuals using advanced technology from Hongs time. They are forced to confront their past to save the future.
Who are the main actors in Back to the Past?
The main actors include Louis Koo as Hong Siu-lung and Raymond Lam Fung as the Qin Emperor. The film also features Bai Baihe, Jessica Hsuan, Sonija Kwok Sin-Nae, and Joyce Tang Lai-Ming.
What genres does Back to the Past belong to?
Back to the Past is a science fiction, action, and comedy film.
When was Back to the Past released?
The movie was released on December 31, 2025.
What is the runtime of Back to the Past?
The film has a runtime of 107 minutes.
Where was Back to the Past produced?
The movie was produced in Hong Kong and China.
What is the tagline for Back to the Past?
The tagline for the movie is To save tomorrow, they must survive yesterday.
What is the vote average for Back to the Past?
The movie has a vote average of 7 out of 10.