FBI forensic profiler Agent Alexandra Darling is known for her unsettling affinity for murderers and their victims.

As she joins a task force assigned to capture a notorious duo of killers, her forbidden fascination with the twisted motivations behind their crimes takes a dangerous turn. Delving deep into the darkness, she finds herself entangled in a dangerous game that blurs the lines between hunter and hunted, love and obsession. One that would forever redefine her understanding of desire, and the depths of her own soul.

She quickly learns nothing is what it seems. Alexandra's journey will test the limits of her sanity at the same time as it challenges her perceptions of justice. Will she be just another victim? Or do they have something different in mind for their little Darling?