A revenge-seeking gangster is sent to prison after being framed for a crime he didn't commit. After seducing a beautiful young woman, he uses her to help him carry out his plot for vengeance, leading him to the crazy pyromaniac who set him up.

Lima, Peru, 1991. After years of fruitless efforts, a group of police officers finally find a lead on the whereabouts of Abimael Guzmán, the bloodthirsty leader of the communist terrorist gang Shining Path.

Dr. Steven Bishop is taken to the hideout of Frank Dillon and his gang to treat the wounded Joe Madison. Joe's nurse sister Nora Madison is also taken. Dillon tells Bishop that if Joe dies, he will be killed, but Bishop knows he will be either way. Joe dies, but Nora and Steve conceal it from Dillon and send a plea for help in a prescription that Bishop writes in Latin.

The story behind the murder of 16-year-old Becky Watts, who was killed by her stepbrother Nathan Matthews and his 21-year-old partner Shauna Hoare in Bristol in February 2015. This programme documents the huge police manhunt that unfolded in the wake of her disappearance, and the police investigation which eventually brought her murderous stepbrother to justice.