The wife of anchorman Dermot O'Flannery dies during a bungled burglary and the killer is never caught. Six months later Poppy and Graham are faced with a long, hot summer dog-walking for Poppy's next-door neighbour. This strange, parallel universe of Planet Dog seems a million miles away from the dreadful events that tore the news-reporter apart, but after a malicious prank is played on their fellow dog-walkers, Poppy and Graham find themselves crossing paths with Dermot O'Flannery. With lethal consequences.