After being sacked from his job at a museum, former security guard Sam Baily returns to the place with a shotgun and dynamite and takes his former boss Mrs. Banks and a number of children (at the museum on a school field trip) as hostages. Local television journalist Max Brackett is in the museum using the restroom after an interview with the curator about financial difficulties. He becomes directly involved in the hostage situation, acting as Baily's intermediary to the outside world and the police.