Drama about the unhappily married Alexandra who hopes to recover from tuberculosis in a mountain resort, but instead meets the multimillionaire Edgar Buchanan.
Hugo Writley, the son of an American shipping magnate, travels to Holland accompanied by his steward, Longway. On the night of their arrival they go to a cabaret, where they get into conversation with two men and their girlfriends who, at closing time, invite the Americans to their home for a few drinks. The hosts, however, turn out to be 'land-sharks' planning to strip the two inebriated Yankees of their cash.
Unaware of its contents, kind-hearted captain Beets delivers a package containing smuggled diamonds to Balthazar, the far from honest owner of an Amsterdam dance-hall. To double his profit, Balthazar shoots the innocent captain in cold blood and makes it appear as if Beets has committed suicide. The captain's daughter Eva and her sweetheart, young author Willy Vermeer, see through Balthazar's plans and will not rest until the criminal is punished for his deed.
