Safety inspector Harry Calder investigates a series of deadly incidents at amusement parks, uncovering a blackmail plot by a psychopathic terrorist. As the investigation unfolds, the terrorist seems to know everything Calder and the FBI do, leading to a thrilling game of cat and mouse.

Rollercoaster
A cunning blackmailer unleashes chaos on American amusement parks, targeting iconic roller coasters and holding them for ransom, threatening to destroy them unless a substantial sum is paid.