When a political researcher named Sonia Baker falls on the Tube tracks and is killed, it devastates her young Labour MP boss. The press smells blood and questions are asked about the nature of his relationship with Sonia. The story is pursued by a leading broadsheet, and its senior reporter, Cal McCaffrey is put on the case - his long-standing friendship with Collins considered a bonus to the editor. Cal is uncomfortable with pursuing what amounts to a domestic scandal until his colleague, Della Smith, discovers a surprising link between Sonia's death and the murder of a black teenager named Kelvin Stagg that same morning. Someone clearly wanted Sonia dead, but why?