Jeff is acting as a bodyguard to a beauty queen, Anne Soames, who wants to visit the Public Records Office. An intrigued Marty watches as she uses a special pair of glasses to cut the alarm and later a file is stolen by a man named Pargiter. When Jeff pursues him, Pargiter explains that the stolen document reveals him to be the rightful king of England - with his two heavies as noble lords. He condemns Jeff as a heretic, tying him up along with Anne, who has outlived her usefulness, and leaving them to die in a burning building. However, Marty sets off the fire alarm, the pair are rescued and Pargiter and his heavies are arrested.

A villain called Hellingworth uses medium Cecil Purley to prove that Marty is indeed a ghost and, posing as an insurance salesman, approaches Jeff for alleged help with robberies in the knowledge that Marty will eavesdrop on the gang and report back to Jeff. This happens but Marty is being used purely as a decoy whilst the gang rob other venues. Eventually Hellingworth decides to get rid of Marty and calls Purley in to exorcise him. For once it is Jeff rushing against time to save Marty rather than the reverse.