During an infamous heat wave in 1976 London, Robert Riordan fails to return after heading out to buy a newspaper, and wife Gretta calls in her grown children for help. Multi-award-winning OFarrell should be a household name here. A sweeping family drama set in London during the summer of 1976. The disappearance of a family patriarch forces three adult siblings to gather together to find him and to confront what they really know about their father and themselves.