The Famous Five's car breaks down on the way to a party, leading them to a small town where they visit a natural history museum and meet Marty, who tells them about a stolen map to a complete dinosaur skeleton. The group decides to join a guided hike to find the dinosaur and solve the mystery, suspecting that one of them might be the thief.

The Famous Five and the Valley of Dinosaurs
The Famous Five embark on a thrilling adventure when their aunt's car breaks down, diverting their road trip to a small town where they stumble upon a captivating mystery at the local natural history museum.