After using Scrub-O Soap, Grape Ape becomes invisible. At the same time, two bank robbers decide to kidnap the inventor of Scrub-O Soap, Doctor Von Brain, and steal his invisibility formula, but they accidentally kidnap Beegle Beagle thinking he's the professor. / Grape Ape is tricked into stealing famous monuments from all over the world by a Beegle Beagle lookalike.