|Underworld: Evolution (also known as Underworld 2) is the second installment (chronologically, the third) in the Underworld series, following Underworld in 2003. Evolution continues the feud between Vampires and Lycans, but highlights glimpses of their origins some centuries ago.
Underworld Evolution is an immediate follow-up to Underworld. Therefore, the events of Evolution begin during the same night of the first film’s finale, and ends only one night later. It has several more constructive plot elements than its predecessor.
In the year 1202 A.D. an army led by three vampire elders (Markus, Viktor, and Amelia) arrives at a Lycan ravaged village. After killing several werewolves, Viktor and Amelia capture their target: Markus’s brother, William Corvinus, the first and most powerful werewolf. Despite Markus’s defiance, Viktor orders that William be imprisoned in a secret location forever.
In the Present Day (just after the events of the first film), Selene takes Michael to a safe house so that she can return to the mansion to confront Kraven. She knows Kraven intends to kill Markus and plans to stop him. However, Singe’s blood has already awakened Markus, turning him into a Vampire-Dominant hybrid. Markus then wipes out Kraven and his men, and destroys the mansion. He learns Selene and Michael’s location from camera surveillance of various safe houses and leaves to track them down. Markus attacks Selene and Michael, who evade him and hide in a warehouse. While inside, Selene and Michael share their feelings and make love.
Lorenz Macaro, an elderly and imposing man, sends in a team of “Cleaners” to investigate the aftermath from the battle in the Lycans’ lair. When Macaro examines Viktor’s body he finds a metal disk attached to his ribcage which is the match to Sonja’s pendant, which is in the possession of Selene and Michael. Now knowing that the pendant is of some importance to Markus, Michael and Selene set out to solve its mystery. Selene recalls that she’d seen it as a child, but doesn’t know its significance. To find answers, they travel to the hideout of the exiled vampire historian, Andreas Tanis. Selene and Michael confront Tanis, who reveals that Markus, not Viktor, was the first vampire; one of the three sons of Alexander Corvinus, the first immortal. Markus was bitten by a bat and became a vampire; his twin brother, William, was bitten by a wolf and became a werewolf. The third son remained human his entire life and gave rise to a line of descendants including Michael, who became the first Lycan-Vampire Hybrid. The first werewolves created by William were entirely animal and unable to take human form again. Due to William’s destructiveness, Markus approached Viktor, a warlord dying of old age, and offered to turn him and his army into immortal vampires in exchange for tracking down and stopping William, and in destroying those he had infected.
Markus intended to capture his brother and tame him, but Viktor ordered that William be locked away forever, far away from Markus. Viktor did not kill the brothers because he believed that doing so would result in the immediate extinction of all other vampires and his Lycan slaves (a deception he had been fed by Markus). Tanis also reveals that Selene’s father was the architect who built William’s prison and that the pendant is a key. After Lucian’s escape, Viktor killed Selene’s family as they knew of the prison’s location, but turned Selene into a vampire. Tanis then refers Selene and Michael to Lorenz Macaro for help. Shortly after they leave, Markus arrives and questions Tanis, who lies desperately and tries to evade telling Markus of his telling Selene the family secrets. Tired of hearing Tanis’s lies, Markus learns the truth by drinking his blood, leaving Tanis unconscious.
Selene and Michael go to see Lorenz Macaro, who is actually Alexander Corvinus. Alexander reveals that he has devoted his life to containing the Vampire-Lycan War away from the mortal world, however, he refuses to help kill his son. When Markus arrives, he apparently kills Michael and learns the location of William’s hidden prison by drinking Selene’s blood. He then attacks and mortally wounds his father, thereby obtaining the other half of the pendant, after deriding his father’s refusal to help William and revealing he and William intend to rule the world as god-like masters of a race of hybrids. On Alexander’s bidding, Selene drinks his blood, enhancing her physical strength and healing abilities to a level equivalent to that of a Hybrid such as Michael and Markus themselves. When Selene asked what she would become, Alexander simply stated “The Future” meaning that she will be as strong as Markus. Afterwards, Alexander blows up his ship, killing himself.
Selene, aboard Corvinus’ helicopter, leads the Cleaners to the prison to confront and destroy Markus, but he has already freed William. A battle ensues in which William bites the Cleaners and begins turning them into werewolves. Michael, presumed to be dead inside his body-bag aboard the helicopter, suddenly regenerates and joins the fight in his Hybrid form. Michael ultimately kills William by tearing his head apart, while Selene kills Markus by pushing him into the spinning blades of the crashed helicopter. After the battle, Selene suddenly realises that her hand is fully bathed in sunlight coming from the roof above, and she is not hurt by it in the slightest. It seems drinking Alexander’s blood has transformed her more than she imagined. Selene narrates that she fears the days ahead, as the death of the Elders will cause nothing but chaos, but she is nevertheless hopeful.