A series of bizarre events in their home town lead the Hardy Boys on a trail of robbers and kidnappers.

"In this new story, based on the original of the same title, Mr. Dixon has incorporated the most up-to-date methods used by police and private detectives."

Exciting Assignment -- An Evening of Mystery -- Faces in the Fog -- A Daring Getaway -- Dancing Gorillas -- A Perilous Slide -- Dangerous Beachcombing -- Postcard Puzzle -- The Old Salt's Story -- A Narrow Escape -- Midnight Caller -- The Desolate Island -- The Threatening Figure -- Signal Three -- Outwitting a Suspect -- Skeleton Symbol -- Hermit's Hideout -- Hidden Watchers -- Rocky Prison -- Ambushing the Enemy -- .