Movie star Roxy Carmichael is abandoning the bright lights of Hollywood, Calif. and returning to her small Ohio hometown — at least long enough to dedicate a city building. And now the whole town of Clyde is bracing for Carmichael’s return, most of all her now-married old flame Denton Webb and troubled teen Dinky Bossetti. An orphan with few friends, Dinky is convinced that Carmichael is her birth mother, and that the actress will reclaim her when she returns.

A wealthy entrepreneur secretly creates a theme park featuring living dinosaurs drawn from prehistoric DNA. Before opening day, he invites a team of experts and his two eager grandchildren to experience the park and help calm anxious investors. However, the park is anything but amusing as the security systems go off-line and the dinosaurs escape.