As the working day concludes, businesswomen Mary Ann Marshall and Renni are the last two daytime employees to leave the skyscraper, but on their way out, they discover that all of the exits are sealed, and that all of the telephones are dead.

The two are then attacked by the dead boy's father; Renni is killed, but Mary Ann escapes by falling into an elevator, which brings her up to one of the tower's unfinished condominiums.

Mary Ann reunites with John, who had stumbled onto the bodies of a pair of murdered guards, and together the two go looking for the building's remaining watchman, finding him just as he is fatally bludgeoned by the killer, who they narrowly evade.

Ray Loynd of the Los Angeles Times praised the film as "a tightly wrought thriller"[2] while People's John Stark criticized it heavily, writing, "it has stilted dialogue, is badly acted and moves as quickly as a bloated buffalo.

"[3] John Stanley, author of Creature Features: The Science Fiction, Fantasy, and Horror Movie Guide, similarly referred to Trapped as a "Clichéd TV-movie, lacking in originality.