After two films in the world of "Underworld", it was deemed necessary to travel back in time to tell the origin of the blood feud between Vampires and Lycans. Originally bred to be slaves to the oppressive vampires, the first Lycan/Human hybrid Lucien falls in love with Victor's daughter Sonja. Being an aristocrat, Viktor can't handle Sonja shacking up with the household help, so he sets in motion the events that lead to the centuries long feud between the two races.
