When Author Ellie Erikson is diagnosed with a rare incurable illness she fears for her future but worse is to come. Paranoia closes around her as her life is threatened from another direction. She is lured to a disused medical institute where her partner Matt is in danger and what she discovers there surpasses any fears she had already imagined. Somebody knows her every move before she makes it. Somebody is out to get her. The gripping climax to "Rat-a-tat-tat" will give her all the answers but only one of them can survive.