A young British widow shelters an old medical school colleague, a man who has somehow turned himself invisible. As his isolation grows and his sanity frays, he schemes to create a reign of wanton murder and terror across the city - and she's the only one who knows that he even exists.

A young British widow shelters an old medical school colleague, a man who has somehow turned himself invisible. As his isolation grows and his sanity frays, he schemes to create a reign of wanton murder and terror across the city - and she's the only one who knows that he even exists.