Ex-FBI agent Saxon has dealt with many killers in her time but nothing can prepare her for the night of horror ahead...It's early evening on Halloween when the Dublin Murder squad are called out to the home of wealthy businessman Daniel Erskine. There, in his basement, they discover Daniel's tortured body. Then, just hours later, his friend Oliver Niland also meets a gruesome end. As special adviser to the Dublin Murder squad, Saxon teams up once again with Chief Superintendent Grace Fitzgerald to track down a killer who's closer than they think. But why has he targeted Daniel and Oliver? And what is the significance of the group known as the Second Circle to which they both belonged? The other members of the group might have the answers - but can Saxon and Fitzgerald get to them before it's too late?