Achterbahn

A horrific roller coaster accident, in which a fully occupied train shoots out of a curve into the crowd at breakneck speed, turns out to be an act of sabotage, which is followed by others a little later. During the first investigation, the technical inspector Harry Calder (George Segal), who is in charge of the investigation, gets on the trail of a young criminal who wants to extort one million dollars with the threat of further similar atrocities. Calder calls in special agent Hoyt (Richard Widmark) from the Federal Criminal Investigation Department and shortly afterwards sees himself chosen by the unscrupulous criminal to hand over the millions in the amusement park in Richmond. Despite precise preparations by the police, the clever blackmailer manages to escape with the huge loot - but it is of no use to him, as the dollar bills have been identified. A new dramatic act of sabotage is in the offing.