Underworld 1

Setting

 Alexander Corvinus is considered the first immortal, and the progenitor of the Vampire and Lycan lines. He was the only survivor of a plague that wiped out his village. Somehow, his body was able to mutate the virus, mold it to his own benefit. He had three sons, of which two inherited his father's immortality and were bitten, one by bat and one by wolf, creating the Vampire and Lycan lines. Corvinus' third son, who did not inherit immortality, also carried the Corvinus Strain, hidden away in his genetic code — an exact duplicate of the original virus, passed along to his human descendants through the centuries. This, according to Singe, is the key to creating a hybrid.

Underworld (2003)

Underworld tells the story of Selene (played by Kate Beckinsale), a Death Dealer bent on destroying Lycans as an act of revenge against the Lycans that allegedly killed her family. She discovers that the Lycans are pursuing a human, Michael Corvin, for experimentation; Selene captures Michael herself to find out what the Lycans are up to. Along the way, Selene not only discovers a mutinous plot to destroy the Vampire Elders, but also a shocking revelation about her father-like Elder,Viktor.