You can read the series description here on Wikipedia, so I'll just tell you what I love about this show. First of all, there are Light and Dark Fae, so we have the classic battle between good and evil. Not all the Light ones are so pure and some of the Dark ones aren't so bad. Much the same as in real life.
Next, we have a strong heroine who gets energy from sex. She goes after what she needs and takes it. Yes, it's the woman doing the taking. As it should be. :-) Bo is a conscientious Succubus, however, and once she figures out how to control her power, she doesn't abuse it. She and her human sidekick, Kenzi, join forces to form a paranormal detective team. Bo is a bit lacking in power, in my opinion, but she makes up for that in smarts. When not trying to discover Bo's origins or keeping peace between the bickering Fae, the two women are fun to watch as they solve tricky cases. Kenzi got on my nerves for awhile, as did the initial debate about Bo choosing sides, but once the story got rolling it became easier to watch.
Then we come to Dyson, the oh-so-yummy werewolf-shifter detective. He falls in love with Bo and she with him, but of course their romance is fraught with problems. Strange problems at that. The sex scenes are delightfully hot and primitive. I would like more. Just sayin', if season four is being made right now. More hot sex, please.
Other interesting Fae characters pop in and out and every one is superb. The story moves fast, so keep up or rewind if you missed something.
Available at Amazon if you must own the series.