Don't bother trying to follow the confusing story in this sloppy sequel to 2003's Underworld. Suffice to say vampire warrior Kate Beckinsale and her hybrid werewolf lover Scott Speedman must unlock the secrets of their respective bloodlines, which prove to have murkier and more violent origins than suspected. Most of the actors from the original are relegated to flashbacks or brief death scenes, while new addition Derek Jacobi hams it up as the immortal cause of the monster feud. Returning director Len Wiseman disregards the plot and makes little attempt to engage the viewer - preferring to ramp up the fast-edited, colour-drained action and cartoon CGI special effects. The only genuine excitement comes in the battle finale, where a crashed helicopter's still-spinning blades become the ultimate weapon.

As the war between the vampires and the Lycans rages on, Selene, a former member of the Death Dealers (an elite vampire special forces unit that hunts werewolves), and Michael, the werewolf hybrid, work together in an effort to unlock the secrets of their respective bloodlines.