Actor Bai Jing Ting is back in another time loop drama after the success of Reset. His new project, Mobius (also titled Sleepless Days), premiered on September 17 on iQIYI, Netflix, and Viki.
Directed by Liu Zhangmu and written by Bi Qiang, the drama adapts Zhang Xiaomao’s novel “Ni Shi Zhen Cha Zu” (Time Reversal Detective Squad). The cast also features Janice Man and Song Yang.
Mobius – Chinese Drama, 2025
- Title: Mobius
- Native Title: 不眠日
- Original: Ni Shi Zhen Cha Zu
- Also Known As: Sleepless Days
- Genres: Time travel, Sci-Fi, Supernatural, Action, Mystery, Thriller, Detective
- Director: Liu Zhangmu
- Aired On: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
- Number of Episodes: 16
- Release date: Sep 17, 2025
- Finale Date: Sep 24, 2025
- Country: China
- Running time: 45 min.
- Watch on: iQIYI, Netflix, and Viki.
The setup and premise
Set in a soft sci-fi world, the series introduces a system where any ordinary day can fall into a time loop. Each cycle begins at midnight and resets at 24:00, no matter where you are. The twist—only five loops are allowed. The fifth day determines the “final outcome.”
The story kicks off with a bank explosion in Hua’ao City. Ding Qi (played by Bai Jing Ting) calmly observes, knowing it’s not the “real outcome” but only a “loop day.” Ordinary people don’t recognize the loops, but Ding Qi uses his ability to sense them to solve multiple interconnected cases.
Suspense and cases
As loops reset, executives of a biotech corporation die one after another. Meanwhile, cryptic “squid murder warnings” surface, pushing Ding Qi into deeper danger. He later discovers he isn’t the only one who holds the “key to time.” With multiple players disrupting the timeline, all secrets will eventually converge on the fifth cycle.
Creative team and direction
Director Liu Zhangmu is known for realism and subtle social commentary in his work. Writer Bi Qiang, who specializes in mystery dramas, balances suspense with commercial appeal. Action director Zhang Peng adds cinematic intensity with hard-hitting choreography and an international edge.
Unique drama format
Promoted as China’s first “limited-flow” suspense drama, Mobius approaches time-loop storytelling differently. It’s not about perfect resets or easy second chances. Instead, every cycle is a “reckoning of choices.” Small actions slowly accumulate, driving the truth closer with each repeat.
The drama deals with questions of life, death, and justice. Characters are forced to confront morality, truth, and survival under the constraints of looping time. The writers aim to create a suspenseful viewing experience while keeping the concept grounded in reality—like a real-life murder mystery game unfolding on screen.
