Constantine (Keanu Reeves) was born to be able to see the demons and angels wandering in the world. This made him very painful when he was a child. He once committed suicide to end his pain in this way. Later, when he learned that there was an agreement between God and Satan that no one could directly intervene in the world. He could only indirectly induce people to choose heaven and hell, while suicide was not allowed to go to heaven. He began to use his natural superpower to help eradicate the demons in the world. In order to pray for a ticket to heaven. Once, while helping a policewoman investigate the bizarre death of her sister, Constantine accidentally released Archangel Gabriel's plot to join forces with Satan's son to rule the world. Of course, Constantine would do his best to prevent this darkness from coming to the world...