Y'know those shows you really get into, and then they get cancelled before the first season has even aired? Yeah. Sadly, this is one of them.
But... for only one season (13 episodes), this show is quite satisfying. It's just unfortunate the story won't continue. DG was likely too expensive to continue producing without the ratings to justify the production costs, but potential future seasons of a great show have been lost.
Still, this is worthwhile entertainment. Well written, well-acted, great chemistry between characters and an awe-inspiring season arch. You won't regret any investment in this show.