Another exciting mystery begins for Frank and Joe when they help a stranger who has had an accident with his car.
What happens when Frank and Joe discover that there is a link.
But when the Hardy boys find an odd-looking house key and try to return it, they realize that John Mead died five years agoThey are even more amazed when they find that the intricately carved doors in the deserted mansion have no visible knobs or keylocks.
The man introduces himself as John Mead, owner of a nearby estate.
Another exciting mystery begins for Frank and Joe when they help a stranger who has had an accident with his car