When Katie and Greg Carlyle invited Greg's estranged daughter to live with them, they had no idea that they would be inviting jealousy, violence, and deceit into their home to wreak havoc on their perfect life.

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.