 Along with flying scenes, the use of zany characters and slapstick efforts were juxtaposed with a spy and zombie story.In 1941, a Capelis XC-12 transport aircraft flown by pilot James "Mac" McCarthy (Dick Purcell) flying between Cuba and Puerto Rico runs low on fuel and is blown off course by a storm.McCarthy, unable to pick up any radio transmissions over the Caribbean, hears by a faint radio signal.