1980Missing presumed dead: that's what everybody thought when Katie Jones, a beautiful blonde toddler, vanished while playing on the water's edge one hot summer's day. 2006A young woman arrives on a Dublin doorstep wielding a gun. She shoots the man who opens the door, then turns the gun on herself. The woman is Katie Jones, and soon a lot of people - especially her family - are looking for answers. Where was she? Who took her all those years ago? And why did she shoot Walter Hogan, a retired GP, straight between the eyes before shooting herself?John Quigley and Sarah Kenny of QuicK investigations are soon involved in their most difficult case so far. The pressure is building and, as they delve deeper into the murky world surrounding Katie Jones, they are unaware that somebody from Sarah's past is watching and waiting to strike when they least expect it.M.P.D. is a compulsive thriller that deals with loss, betrayal and revenge. John and Sarah are about to discover the cost of all three.