The ex-girlfriend of a German fugitive hides with the captain and crew of a ship on the Rhine.

A story of the location of shipwrecked treasure (gold ingots) being hunted down by 4 children George, Julian, Dick and Ann (sic) and their dog Tim up against a couple of machinating baddies...

A bunch of kids beat a nasty old antique dealer to a hidden treasure chest left by a fleeing Cavalier.