Unlike his ancestors who killed all Wesen on sight, Nick learns that many Wesen are peaceful and integrated into human society. He decides to uphold the law, protecting innocents (both human and Wesen) while hunting the violent ones. He is guided by a "reformed" Blutbad (big bad wolf) named (Silas Weir Mitchell), who becomes his best friend and partner in understanding the Wesen world.
: The procedural elements take a backseat to a massive, serialized war involving a Wesen uprising known as Black Claw Grimm Serie Completa