There doesn't seem to be much of a plot, just a series of cop encounters. I think Nathan needs to be a stronger character and more central to the show. Right now he's just another cop on a cop show. I want to like it, I guess I want to like it as much as I liked castle and it's no castle.
The other characters don't hold a candle to the cast so castle. There is no chemistry between Nathan and his love interest.
Sorry. Make it better!