Merten, a young engineer, stows away on the airship Hindenburg as it departs Nazi Germany. His love for a wealthy daughter of an American tycoon leads to accusations of murder and rumors of a bomb on board the blimp!

As the airship Hindenburg approaches New Jersey, Merten overhears conversations about the on-board bomb - can he convince the crew he is not a killer and find the explosive before the zeppelin lands?