Set after the events of Underworld: Blood Wars (2016), Selene (Kate Beckinsale) is on the run from the vampire coven and hunted by both vampires and Lycans. Joined by survivors like David (Theo James) and Nyssa (India Eisley), they embark on a mission to end the war between vampires and Lycans once and for all.

The film follows Selene as she uncovers a conspiracy within the vampire hierarchy and learns of a secret that could change the balance of power between vampires and Lycans. The plot thickens when she becomes romantically involved with Michael Corvin (played by Scott Speedman), a human who gets caught in the middle of this supernatural conflict and whose bloodline holds the key to a new breed of hybrid creatures.

The movie is packed with action sequences, from intense gunfights to hand-to-hand combat, blending martial arts with supernatural powers. Beckinsale’s portrayal of Selene as a fierce, agile, and deadly fighter became iconic, cementing her as a memorable action heroine.