The Witness

A rookie cop who forfeits her post to search for her rebellious brother, ending in a devastating crash that leaves her blind. Three years later she uses sharp police training to deduce crucial details from the crime scene while navigating life in darkness. Her determination to prove herself drives her to confront danger, treat the sightings’ trail as a puzzle, and protect others from the same fate she narrowly escapes.

A reckless, music-loving teenager whose curiosity puts him on a collision course with a serial kidnapper. He becomes Xiaoxing’s informal guide and a key link to the phone camera that helps them stay safe. He admires the dead singer whom Xiaoxing is later revealed to be the elder sister of, giving him a personal stake in the investigation.

A plastic surgeon who turns to kidnapping after killing his own sister in a misguided attempt to remake women into her image. He uses the dating app to lure victims and pursues Xiaoxing with fanatical persistence. His dual obsession with control and family loss makes him dangerous and unpredictable.

The head of the police who initially resists giving Xiaoxing another chance but eventually engages with the case as it becomes personal. She represents institutional authority and pragmatic judgment, balancing the pursuit of leads with the safety of the city’s residents. Her collaboration with Xiaoxing evolves as the investigation tightens.

The search-and-detect dog who aids Xiaoxing but tragically loses its life in the chaotic pursuit. The dog embodies loyalty and the tangible costs of violence that ripple through those connected to the case. Its memory underscores the stakes of the investigation.