At a posh cocktail party, various plans are made, and a missing guest turns up late.

Sex offender Carl Gatliss is paroled with a tiny camera implanted behind his retina to monitor his every move and send it back to probation officers Esther and Ken,who are watching on a screen. After he breaks parole by visiting his victim to make amends Ken wants him returned to prison but Esther prevents it. As a result Gatliss obsesses about Esther,killing his girlfriend for her and ultimately arriving at her house when she is alone and vulnerable.

Members of a British opera troupe mount a production of "Sweeney Todd" within a maximum-security prison.