Killing Couples tells stories of murders committed by couples. First up is an Italian story – a young woman claims she came home as Albanian murderers stabbed her mother and 12-year-old brother. They were each stabbed more than 40 times in a frenzied attack. But the police observe the two teenagers – and after watching their behaviour, have enough to prove that it was in fact carried out by the young daughter and her boyfriend.
The next story travels to Oregon, with the story of a uniquely devoted wife – she lures girls into her car to take them back to her boyfriend - only to rape and murder them. Over three stories of kidnappings and then beaten bodies being located, the police catch the couple behind the attacks and the two are charged. She gets released years later, whereas he dies in prison during consecutive life sentences.