Oak Hollow is a small, shrubbed valley not far from Bayport but which had been untouched by the town's progress until the construction of a housing estate began. The building project was undertaken by Mr. Prito, father of Tony Prito, a friend of Frank and Joe Hardy. Prospective sales were handled by real estate agent Mr. Morton, father of another of the Hardys' friends, Chet Morton.
Opening of the housing development was delayed by vandalism perpetrated by the Footprints spy ring. The gang were hiding out in a tomb in the nearby cemetery and sabotaged the building project so they would be able to remain hidden.