Master sleuth Mr. Wong (Boris Karloff) and a newswoman (Marjorie Reynolds) help a police captain (Grant Withers) catch a killer.
A newswoman (Marjorie Reynolds) asks sleuth Mr. Wong (Boris Karloff) to look into the murder of a shipping tycoon.
Dr. Bernard Adrian (Boris Karloff) is researching a way to help a
wheelchair-bound patient, Frances (Maris Wrixon), use her legs again.
The only way he can achieve this is by procuring spinal fluid from a
human. When an ape escapes from a circus, Dr. Adrian kills it in a
confrontation and successfully uses its spinal fluid
on Frances -- but he needs more. Using the ape's body as a suit, he
kills townspeople in a crazed attempt to complete his plan.
