Dramatisation of the true story of the notorious 'acid bath murderer' John Haigh, who murdered women and disposed of their bodies in vats of acid in the 1940s. He was only caught when the gallstones of one of his victims failed to dissolve in the acid and were detected by the pathologist who examined the residue from the acid bath.
A hapless parole officer is framed for murder by a crooked police chief. To prove his innocence he must entice his former clients away from the law abiding lives they are now living to recover the evidence that will save him.
