Nigel Patrick is effective as a Scotland Yard chief inspector on the trail of a sophisticated gang responsible for a Whitechapel bank robbery. "Johnnoe" is getting close. His meticulous, no-nonsense, style of investigation is leading him close to Frank Finlay's "Sale" whom we know from the outset is a lynchpin in the criminal organisation. The criminals are no slouches, though, and they cleverly arrange to set-up the policeman and have him disgraced and suspended. Now it falls to his wife "Mary" (Katherine Woodville) and the brother of one of the gang's other victims "Ruskin" (Colin Blakely) t...