Hum and Hannen are spry newlyweds, off on their honeymoon. Hannen is also an inventor with secret plans. Little do the newlyweds realize that international crooks are out to steal Hannen's plans, who is soon kidnapped by the bad guys. However, when it's discovered he's not in possession of the plans, Hume is left to contend with the conniving Huth, who acts like a gentleman, but in actuality is a slimy, low-down scoundrel. A wonderful cat-and-mouse game then begins.