Famous Five 04 Five Go To Smugglers Top (standard)

Staying at kirrin cottage, it doesn't take long for the famous five to come across a mystery. Kirrin cottage is a rambling old house, with secret hiding places, and even an underground tunnel. But the five aren't the only ones to make this discovery.. somebody else is using the tunnel, too! but exactly who, and why? it's up to the famous five to find the answers..