Selene finds the body of a young woman on the banks of the Hudson river, mutilated and wearing a wreath of laurel. She feels a rage not felt in a lifetime, and an obligation: the promise that she made long ago. To protect those who are innocent -who cannot protect themselves.
With the NYPD out of their depth, Selene must hunt the killer on her own. But when classics professor Theo Schultz offers his expertise to solve the case, the solitary huntress finds herself working with a man who's her opposite in every way.
Together, they discover that a long-forgotten cult is behind the string of murders terrorizing the city. They'll need help from the one source Selene distrusts most of all: the city's other Immortals.