Three children find themselves accidentally transported to a world that existed 65 million years ago just as the comet that caused the dinosaurs' extinction is about to hit. The children narrowly escape the comet's fiery aftermath, thanks to a shoestring.

Kyle age 14, his sister Teresa, age 12 and another girl, Sonja find themselves in a world that existed 65 million years ago just as the comet that caused the dinosaurs' extinction is about to hit. A bizarre device is the invention of the children's fathers, scientists, who are unaware their children accidentally stepped into the time capsule as it was in the process of being transported. The children find a dinosaur called a Bambiraptor-a cross between a reptile and bird (it really existed!). It becomes their pet. The children narrowly escape the comet's fiery aftermath-thanks to a shoestring!