When Lord Peter Wimsey marries Harriet Vane, a crime author, they both promise to give up crime for good. As a wedding present, Peter purchases the old house where Harriet grew up, but when they try to move in the previous owner is nowhere to be found, until they start to clean the house and find his body in the cellar...

In England, an eccentric police inspector, an earnest test pilot and a spunky female reporter team up to solve the mystery of a series of test aircraft which have disappeared without a trace while over the ocean on their maiden flights; unaware, as they are, that a spy ring has been shooting the planes down with a ray machine hidden aboard a salvage vessel which is on hand to haul the downed aircraft aboard, crews and all.