ConstantineSave

The film opens in Mexico, where a poor scavenger named Manuel discovers an unusual artifact buried in the rubble of an abandoned church: the Spear of Destiny, the Roman lance that pierced the side of Christ at the crucifixion, wrapped in a Nazi flag. The moment Manuel touches the spear, he becomes possessed by a malevolent supernatural force. He walks barefoot across desert highways, surviving impacts that should kill him, traveling north toward Los Angeles with unnatural purpose. The opening establishes the film's premise: the supernatural world is real, the war between Heaven and Hell is fought through human proxies on Earth, and a major escalation has just begun.

John Constantine (Keanu Reeves) is introduced exorcising a young Latina girl in a Los Angeles tenement. The exorcism reveals that the demon possessing her is a half-breed, a creature that should be unable to enter the human plane. Half-breeds are bound by the rules of detente: they may influence humans through whispers and suggestion but may not directly cross over. A demon making physical contact with a person on Earth is a violation of the cosmic balance Constantine has spent his career enforcing. He extracts the demon by trapping it in a magical mirror and shattering it, then leaves the apartment chain-smoking despite his terminal lung cancer diagnosis. Constantine has months to live and knows it.

Constantine's backstory is delivered through several conversations. He committed suicide as a teenager after being unable to cope with his innate ability to perceive the half-breeds walking among ordinary humans. He was clinically dead for two minutes before being revived. By the rules of his Catholic upbringing, suicide damns the soul permanently to Hell. He has spent his adult life sending demons back to Hell in the hope that his service to the divine order will earn him a reprieve. The Heavenly emissary who serves as his contact, the half-breed angel Gabriel (Tilda Swinton), has informed him that his service is meaningless: salvation is granted by faith, not bargained-for action, and Constantine's lung cancer will deliver him to damnation regardless.

LAPD detective Angela Dodson (Rachel Weisz) approaches Constantine with a case he initially refuses to take. Her identical twin sister Isabel, a psychic patient at a Catholic mental institution, has died by jumping from the hospital roof. Angela believes the suicide is impossible: Isabel was a devout Catholic who would never damn herself voluntarily. Angela needs Constantine's expertise in supernatural matters to investigate. Constantine eventually agrees, partly because he is intrigued by Angela's repressed psychic abilities (which mirror her sister's), and partly because the demonic activity in Los Angeles has been escalating in ways that connect directly to Isabel's death.

Constantine's investigation takes him through several supernatural Los Angeles locations established in the film as a literal underworld of magic. He visits the bowling-alley front of a half-demon nightclub run by Midnite (Djimon Hounsou), a former voodoo priest turned neutral-territory bartender; the warehouse workshop of a manic gadget-maker called Beeman (Max Baker) who has stockpiled rare exorcism artifacts; and St. Sebastian's, the Catholic hospital where Isabel was a long-term patient. He confirms that Isabel was being targeted by demonic forces and that her death involved the spear-bearing possessed migrant Manuel from the opening sequence, who has reached Los Angeles and made his way to the city's gang underworld.

The conspiracy is gradually revealed. Mammon, the son of Lucifer, intends to break the cosmic balance by physically incarnating into the Earthly plane through Isabel's body. Isabel has been chosen as the vessel because of her psychic-twin connection with Angela; Mammon needs Angela alive as a backup vessel if Isabel cannot complete the transition. The Spear of Destiny, soaked in the blood of Christ, contains enough divine power to permit the breach. The orchestrator of the plan is Gabriel, the half-breed angel Constantine has worked with for years, who has decided that humanity is unworthy of God's continued grace and that allowing Mammon to incarnate will provoke the divine intervention required to wipe humanity clean.

The film's climax takes place at St. Sebastian's, where Mammon's incarnation ritual has been initiated through Angela's body. Constantine arrives mid-ritual, accompanied by his young apprentice Chas (Shia LaBeouf). Chas is killed during the assault on the building, an emotional cost that Constantine will reckon with in the closing reels. Constantine confronts Gabriel, slits his own wrists with shards of glass to deliberately invoke a suicide-rules summoning of Lucifer, and waits. Lucifer himself (Peter Stormare) arrives personally to collect Constantine's soul, which he has been wanting for years. Constantine reveals Mammon's incarnation in progress, an act of rebellion against Lucifer's authority that no Devil could permit.

Lucifer extracts Mammon from Angela's body in a brutal, blood-soaked sequence and returns him to Hell, restoring the cosmic balance and stripping Gabriel of his divine wings as additional punishment. Lucifer offers Constantine a reward: a single boon for his service in exposing Mammon's coup. Constantine asks for Isabel's soul to be released from Hell to Heaven, an act of selfless redemption. The act qualifies Constantine's life-pattern for divine grace. Lucifer attempts to drag Constantine's soul to Hell anyway, but the divine forces intervene and Constantine is pulled toward Heaven instead. Lucifer, enraged, reaches into Constantine's chest, removes his lung-cancer tumors with his bare hands, and restores his health, condemning Constantine to live longer specifically so he can damn himself again later.

The film's epilogue resolves Constantine's relationships. He gives Angela the Spear of Destiny for safekeeping, advising her to embrace her psychic abilities as Isabel had. He visits Chas's grave, watches Chas reappear with newly-grown angel wings as a partial-redemption gesture from above, and lights what appears to be a piece of chewing gum (his nicotine substitute) instead of his customary cigarette. Constantine grossed $230 million globally on a $100 million budget, a moderate commercial success that became a strong cult classic across the late 2000s and 2010s home-video releases. Director Francis Lawrence would later helm The Hunger Games sequels and I Am Legend. Keanu Reeves returned to the role with Constantine 2 announced for 2026 with Lawrence again directing. The film's blend of Catholic-iconography horror, noir-inflected detective procedural, and supernatural-ability lore established the visual template most subsequent occult-detective adaptations would follow.

The casting of an American Keanu Reeves as the canonically British, blonde John Constantine was the film's most-controversial creative decision among long-time Hellblazer comic readers, who had grown attached to the character's specifically working-class Liverpudlian voice. Reeves's interpretation, recasting Constantine as a brooding Los Angeles-based occult detective, departed substantially from the source material; Tilda Swinton's Gabriel reimagined the angel as androgynous and morally ambiguous; Peter Stormare's Lucifer was a deliberately small-scale, white-suited businessman rather than the cosmic-scale terror of the comics. The 2024 Justice League Dark animated film and the upcoming 2026 Constantine 2 have both reportedly worked to bridge the gap between the 2005 film's interpretation and the source material's more-faithful portrayal. The 2005 picture nonetheless remains the most-watched Hellblazer adaptation by a significant margin and the entry point through which most modern viewers first encountered the character.