Returning from their honeymoon and near brush with death in Constantinople, Lady Emily and her husband Colin Hargreaves are relaxing at his mother's beautiful estate in Normandy. But the calm Emily so desperately seeks is shattered when, out riding her horse, she comes across the body of a young woman who has been brutally murdered; the wounds on her body mirroring those of those inflicted on the victims of Jack the Ripper who has wreaked havoc across the channel in London.

Pursuing a trail of clues and victims to the beautiful medieval city of Rouen, Emily begins to fear for her own sanity. She hears the cries of a young girl she cannot find and discovers blue ribbons left in the child's wake. And as Emily is forced to match wits with a brilliant and manipulative killer, only her courage and instincts can prevent her from becoming his next victim...