The Secret Seven see a house burn down, then they witness the theft of a valuable violin! Are the two incidents connected?

Dick's been kidnapped, mistaken for someone else, and the Famous Five are frantic! Desperately, they track him down to a sinister old house in the middle of nowhere - and he's safe and well! But just when they thought their troubles were over, the gang find themselves held captive and in terrible danger!

Spook Trains in the dead of night! They seem to vanish into thin air. Where do they go? The Famous Five follow the tracks and discover an underground destination...

Enid Blyton's The Famous Five and The Five Find Outers meet in an adventure, and they all have to work together to solve the mystery.