Twenty years ago, Kate Maddox was a volunteer at a research centre where scientists hunted for a cure for the common cold virus. That summer, Kate fell in love with a handsome young doctor, Stephen, but her stay ended in his tragic death & Kate fled to a new life in the US. Now Kate is back in England & on the run with her young son, this time from her vile husb&. But a chance encounter sets her on a terrifying path of discovery. What really happened at the Cold Research Unit two decades ago? Pursued by both her estranged husband & a psychotic killer who is obsessed with his prey, Kate must fight to solve the puzzle of the past ? uncovering a sickening betrayal & a truth more horrifying than she could ever have imagined?