Lionel Atwill is the wealthy "Walter Stephens" whose life has been threatened by the sinister "Gorilla". To thwart this, he engages the services of the "Defective Detectives" (Jimmy, Harry & Al Ritz) and what ensues is a slapstick horror movie with a man in a gorilla suit (or, could it be an actual ape?) and some pretty corny set piece comedy sketches strung together around Atwill and a rather under-used Bela Lugosi ("Peters"). Much of the plot is just gibberish, but the detectives have a good time, and that brings a limited amount of charm as they haplessly go about their deducing - and it isn't horrible to watch, but it's pretty cringe-making at times and 80 years after it was made is nigh on unwatchable for anything other than a kindly nod to pre-war comic cinema.