Dave Emerson (Kinski) is a member of a large aristocratic family in Britain ruled by the steely Lady Emerson (Ilse Steppat). The only other notable members are Dave's twin brother Richard (Kinski), and their lovely younger sister Myrna (Diana Körner). Dave has been sent to an insane asylum following the murder of their gardener, even though he insists he's innocent.
He escapes the clutches of the cruel Dr. Mangrove (Carl Lange) and swaps places with Richard at their country estate, but right as he arrives at home the murder begins anew. A killer in a hood with a single eyehole is stalking the grounds stabbing people to death using the arm from a suit of armor, painted blue and modded out with razor sharp claws at the tip!
On the case is Inspektor Craig (Harald Leipnitz), a detective with - who else - the Scotland Yard ...
Another twisty and barmy mystery concoction featuring a killer with a clawed hand, passageways, snakes, a mental asylum headed by the fiend Dr Mangrove, and twin brothers. It's gets a bit confusing, taxing my brain cells with so many changes in the plot, but it was fun- just don't try to figure it out too much. Nice to see Klaus Kinski in a restrained non-villainous role.
