The House on the Cliff

Fenton Hardy, the famous private detective and father of the Hardy Boys, asks his sons to help him with his latest case involving the illegal drug trade. Hardy sends Frank and Joe to a house on the cliff, whose location offers an excellent vantage point to watch for smugglers.
The Hardy Boys are tricked into going inside the house by cries for help, and find themselves trapped for a short time in the attic; meanwhile, their telescope and motorcycles are damaged. From the attic they see a m...