Frank Renfield, Baron Renfield of Renfield Hall, will go to any lengths to preserve his noble heritage. Along with his fiercely determined wife Carole, he concocts a plan to marry their daughter to Karl Langer, a young American millionaire - a union that will solve all Frank’s urgent problems. Unfortunately for her parents, Jessica is in love with Alan Lavender, a handsome, but crude young man.

When Alan’s uncle is found murdered, suspicion immediately falls on Frank as a result of his uneasy relationship with the man. The Renfields throw a lavish birthday party for Carole, but the evening is tainted when Alan is killed and a young man shoots himself dead. And things take a sharp turn for the worse when another, unconnected, murder is laid at Frank’s door.

Can Frank prove his innocence? And will the murderer be caught before they strike again?