The call comes from a troubled man. Someone, he says, is trying to kill him.

He can't divulge more over the phone, but Felix Berg wants to meet. At midnight.

Out by the lighthouse at Howth, Reluctantly, Saxon agrees. But could it be a trap?

It's not, and soon former FBl agent turned true crime writer Saxon is plunged into the heart of a series of apparently motiveless murders that is gripping the city. Four times the gunman known as the Marxman has struck and four times the Dublin Metropolitan Police murder squad have drawn a blank.