Series of Japanese science fiction tokusatsu films loosely inspired by H. G. Wells' The Invisible Man novel, which were both produced and distributed by Daiei Film in response to the success of the Universal Monsters franchise.
A scientist successfully creates an invisibility serum, only to be kidnapped by a gang of thugs who wish to use the formula to rob a priceless jewel.
Police investigate a series of mysterious murders where the only clue is a strange buzzing noise at the scene of the crime.
