Murders across different cities seem unconnected-until a shocking discovery ties them together in a chilling web of deceit and retribution.

A former concentration camp commandant is brutally murdered on the streets of Düsseldorf. The bludgeoned body of a renowned anesthesiologist washes ashore on a Florida beach. Two mutilated corpses are unearthed from shallow graves in upstate New York. At first glance, these horrific deaths appear unrelated, but a startling coincidence soon emerges, linking these gruesome crimes.

A tenacious detective, a relentless Nazi hunter in Germany, and a psychiatrist in Palm Beach are drawn together by a single thread-a thread that leads them to the most unlikely of suspects: Dr. Emmett Hesse. Respected, admired, and revered by the medical community and patients alike, Hesse embodies the Hippocratic oath, "First, do no harm." But behind his kind eyes and gentle demeanor lies a terrifying secret-one that threatens to shatter everything he holds dear.

The Unlikely Sinner is a gripping psychological thriller that will keep you on the edge of your seat as the dark past unravels and the true nature of justice is revealed.