It's 1634, and detective Samuel Pipps is being transported to Amsterdam to be executed for a crime he may not have committed. Traveling with him is his loyal bodyguard, Arent Hayes, and Sara Wessel, a noblewoman with a secret. But no sooner is their ship out to sea than a strange symbol appears on the sail, and then the passengers hear a terrible voice, promising three unholy miracles, followed by a slaughter. With Pipps imprisoned, only Arent and Sara can solve a mystery that stretches back into their past and now threatens to sink the ship.