Loosely based on the apocryphal Book of Enoch, the game follows Enoch, a human scribe in Heaven who is sent down to Earth, tasked by God with purifying the seven fallen angel Watchers and returning them to Heaven before humanity is irrevocably corrupted with half-human Nephilim and a great flood made inevitable. He is assisted in his journey by God's right-hand angel Lucifel and the four other Archangels.