Preston Tylk is an ordinary guy living in Seattle. When he discovers that his beloved wife, Emily, is having an affair, he is devastated. Storming out of the house, he returns later only to find her brutally murdered.
After Portland homicide detective Nick Burkhardt discovers he's descended from an elite line of criminal profilers known as "Grimms," he increasingly finds his responsibilities as a detective at odds with his new responsibilities as a Grimm.