A party of tourists -- including a state senator (Susan Sullivan), a park ranger (Dennis Cole) who was her one-time lover, a cantankerous professor (Ray Milland), and an escaped convict (James Olson) -- are trapped deep inside the caverns of an unnamed national park, rescued briefly, and then caught in a second cave-in. This Irwin Allen mini-disaster film made in 1979 was shelved for a number of TV seasons, as was his "The Night the Bridge Fell Down", made back to back with this one by the same director and much of the same crew.
The film portrays a fictional nuclear war between NATO forces and the Warsaw Pact that rapidly escalates into a full scale exchange between the United States and the Soviet Union, focusing on the residents of Lawrence, Kansas, and Kansas City, Missouri, as well as several family farms situated next to nearby nuclear missile silos.
The Griswold family are on a quest. A quest to a Walley World theme park for a family vacation, but things aren't going to go exactly as planned, especially when Clark Griswold is losing all thought towards a mysterious blonde in a red Ferrari.