A PREDATORY KILLER: Memories haunt Violet Chambers. Taking tea with her friend Daisy, she knows it's time to move on. As Daisy falls to the floor, eyes streaming, face burning, Violet calmly waits. Black hellebore is remarkably potent. It won't be long now.A DAMAGED DETECTIVE: Diagnosed with a rare neurological condition, DCI Mark Lapslie is alienated from his family and considered unreliable by colleagues. Unable to work in close proximity to others, his career is seemingly at an end. Given a case no one else wants, this is his last chance.A TERRIFYING DISCOVERY: As her crimes go undetected and the body count rises, Violet is losing touch with who she thinks she is. Will Lasplie get there in time? What will he find when he does?