>>The federal agent is human. His name is Rove.
The crime boss is half-human, half-nothos. His name is Lux.
Rove and Lux have a business arrangement where they exchange information?Rove offers Lux a heads up about certain government activities, and Lux helps Rove take out other criminals?and they are also lovers. <<
So, yes, the agent, Rove, and the crime boss, Lux, both men, are in a romantic relationship.
I've done some more checking into loglines written specifically for television, and they're actually much broader than film loglines in scope, and don't really identify a grand stake--like the extinction of the human race would be--most of the time. Instead they're more of a general setup, with maybe implied stakes and goals.
At any rate, I'm going to continue working on this and may reply tomorrow or so with an updated revision.
Thank you for all of your help!