Single mother Mary Harris (Dhavernas) is an ER doctor by day, but by night, she and her partner, a former plastic surgeon, moonlight as underground angels of death and help terminally ill patients slip away on their own terms. So far Mary has managed to stay under the radar; but death is hot, business is booming, and her double life is getting complicated. When her world starts to unravel, Mary realizes she's going to have to fight dirty if she's going to stay in the killing game.