In the fog-choked winter of 1897, a series of blood-soaked killings across Europe draws the attention of a secret Vatican order. They dispatch the weary, shotgun-toting hunter Abraham Van Helsing (Bruce Campbell) to investigate. His trail leads to a crumbling Black Forest estate where Count Vladislav (Julian Sands), a lonely and bitter vampire, has been unnaturally weakened by a stolen amulet—the same relic now sought by a resurrected Egyptian high priest, Imhotep (Oded Fehr). As Van Helsing digs deeper, he uncovers a conspiracy: a mad alchemist (Brad Dourif as Dr. Jekyll) is collecting monster specimens—Frankenstein's Creature (Clancy Brown), a captive werewolf (Mark Rolston), and even the Gill-man (Tom Noonan)—to create an unstoppable hybrid army for an occultist society.
The amateur alliance of monsters breaks free during a thunderstorm, forcing Van Helsing to form a bloody, reluctant truce with Dracula and the tormented Bride (Sheryl Lee). Meanwhile, the Invisible Man (Timothy Carhart) sabotages both sides from the shadows, playing a dangerous double game. The climax explodes inside a flooded abbey laboratory, where Jekyll unleashes Hyde, the Mummy commands the dead, and the Creature makes a heartbreaking choice between revenge and humanity. In the end, no hero survives unscathed—and the Dark Universe is sealed not with a victory, but with a promise of eternal, crumbling darkness.