Portland homicide detective Nick Burkhardt (David Giuntoli) is a descendent of a long line of hunters known as Grimms. Grimms can identify and protect humans from the many creatures that go bump in the night, supernatural creatures like werewolves, and other shape shifters.
Nick has spent most of the first season of "Grimm" adjusting to his newly acquired abilities, but his other life is starting to impact everyone around him. His partner Hank Griffin (Russell Hornsby) remains oblivious about Nick, but his proximity to the Grimm has made him a target of hexenbiest Adalind Schade (Claire Coffee), who is plotting something as yet unknown with the pairs' boss, police chief Captain Renard (Sasha Roiz).
But the person who has been most affected by Nick's supernatural sleuthing is his lady love Juliette (Bitsie Tulloch). When the series began, Juliette was relegated to the background, as the show concentrated on introducing its intricate mythology and breakout characters, like the wonderful Silas Weir Mitchell as Monroe, a reformed Big Bad Wolf. But as the show has continued week by week, Juliette has been coming more to the foreground. She can tell that something is up (she has better detective instincts than Hank). She seems drawn to some of the creature/people that Nick runs across. She may not be abe to see their true faces as Nick does, but she can feel that they are different, special, or in need of help.
In the most recent episode, "The Thing with Feathers," Nick only had eyes for Juliette and has plans for a big, romantic weekend, complete with a surprise proposal. But Juliette could immediately sense that a couple staying near their vacation getaway had major problems. And when the going got tough, she grabbed a gun and helped Nick pursue the predatory husband through the woods. When it came time for Nick's big proposal, Juliette turned him down. It came as a surprise to him, but viewers have been clued in to Juliette's dissatisfaction for weeks -- the increasing dangers in his job and his reluctance to explain any of the recent strange occurrences to her don't make for a solid relationship.
There is so much to like about "Grimm," and it just keeps getting better and better. Nick and Monroe have also become partners of sorts, as Nick needs someone on the inside to help him identify the various beasts he encounters. Juliette and all of the other supporting characters keep getting more interesting with each episode. Happily, "Grimm" has been renewed by NBC for a second season of 22 episodes, so we can continue to watch these characters grow and evolve, revealing their secrets, much like "Grimm's" special effects, which show the bird or beast behind the faces of the many otherworldly residents who live in the surprisingly eerie city of Portland, Oregon.