Leviathan

The Earth is cursed, humans scrape meager livings from the soil, and legendary beasts roam the wilderness. When a fearsome leviathan threatens his homelands, Noah must find a way to defeat the monster. Desperate to discover its weakness, he journeys to seek the aid of the half-angel giants called the Nephilim. Meanwhile, the angelic Watchers known as the Grigori have seized the great city of Enoch, and their powerful leader has become obsessed with Noah's bride-to-be. Friendships and faith ...