When a man is found dead one early morning with his throat cut, detective J.G. Reeder knows he is about to have his work cut out for him. It can but only be the work of John Flack, Crazy John Flack. An evil genius madman, he's escaped from Broadmoor Criminal Asylum and is on move. But detective Reeder is perhaps the only match for Crazy John, and he's not giving up easily. A thrilling murder mystery tale of two sharp witted men trying to out-do one and another, Edgar Wallace's 'Terror Keep' is ideal for fans of the blockbbuster hit "Knives Out" starring Daniel Craig.