Underworld

Underworld is a 2003 action-horror film about the secret history of Vampires and a type of Werewolf known as Lycans (an abbreviated form of lycanthrope). It is the first film in the Underworld series. The main plot revolves around Selene, a Vampire who is a Death Dealer who has devoted herself to the extinction of the Lycan species. She finds herself attracted to a human named Michael Corvin, who is being targeted by the Lycans. After Michael is bitten by a Lycan, Selene must decide whether to do her duty and kill him, or go against her clan and save him.

Underworld is written by Len Wiseman, Kevin Grevioux, and Danny McBride and is directed by Len Wiseman.