As she tracks Michael, Selene uncovers a web of lies within her own coven and a shocking secret about the origin of the two species. Defying her leaders, she must protect Michael and decide where her true loyalties lie before the war consumes them both.
Released on September 19, 2003, Underworld introduces a secret, centuries-old battle between two immortal species hidden beneath human society:
: It is revealed that Michael is a descendant of the Corvinus bloodline , possessing a rare genetic strain that allows his body to host both vampire and Lycan DNA.