Trapped

A practical, resilient employee who becomes the central survivor after finding the exits sealed and the phones dead. She showcases quick thinking and courage, navigating the tower's dangers and seeking help from NTX leadership while forming a tenuous alliance with a corporate spy.

A corporate spy living secretly in the building to steal NTX secrets. He partners with Mary Ann to uncover the killer and survive the night, bringing stealth, cunning, and practical problem-solving to the crisis.

A daytime employee who encounters the intruder and is killed during the escape attempt, underscoring the deadly stakes of the lockdown and the peril that befalls even seemingly ordinary coworkers.

The relentless father of the dead boy, depicted as a violent, single-minded pursuer. His attacks drive the suspense and push the protagonists into increasingly dangerous confrontations.

Head of NTX, whose death in the penthouse triggers unraveling of the corporate mystery. His presence and ultimate fate anchor the thriller’s backdrop of corporate power and betrayal.

The building’s watchman who becomes a victim in the escalating violence. His appearance marks the danger creeping through the security staff.

An NTX employee whose role hints at the high-level corporate machinery behind the building’s operations and the night’s crisis.

A figure within NTX whose precise role isn’t detailed in the summary, but is part of the corporate backdrop that the protagonists navigate during the lockdown.