"Centaurus" revolves around the cynical, smart, and a bit smart-ass high-schooler, Lyn Dyer, and three mysterious brothers who seem just a little out of this world. When they seek Lyn’s help in finding a theriac once fashioned by her great grand-mother long ago, Lyn is suddenly caught in a supernatural battle between ancient immortals as legend comes to life, brother turns against brother, man becomes monster, and a lethal assassin emerges from the Underworld and brings hell along with her.