Detective Sergeant Washington Poe can count on one hand the number of friends he has. And he'd still have his thumb left. There's the insanely brilliant civilian analyst Tilly Bradshaw his beleaguered boss Detective Inspector Stephanie Flynn and his nearest neighbour Victoria. And then there's Estelle Doyle. Her father's murder appears to be an open and shut case but Estelle has firearms discharge residue on her hands and the only footprints going into the house are hers. Since her arrest she's only said three words: 'Tell Washington Poe.' Meanwhile a poisoner the press have dubbed the Botanist is sending high profile celebrities poems and pressed flowers. The killer seems to be able to walk through walls and regardless of the security measures the police take he seems to be able to kill with impunity . . .
