Luther Heggs is certain the answers to a murder mystery lie in the old Simmons mansion, so he visits the estate at the witching hour of midnight. Certain he's seen a ghost, Luther writes a story which makes front page news - and brings on a libel suit from the mansion's owner. When the trial judge orders an investigation - and no apparition appears - Luther is branded a fraud. That is, until he and his devoted girlfriend team up to uncover the mystery of the hauntings - and the true murderer - in this timeless comedy classic.