DS Nadia Osei didn't expect her first big case in Bermondsey to reach all the way to her own station. When a former gang lieutenant is found dead in south London, every suspect has an alibi and every witness has a reason to stay quiet. But Leon Ashworth was three days from blowing open a conspiracy that went right to the top — and someone made sure he never got there. In London's gang territories, the truth is the most dangerous thing you can carry.