What if the beings humanity once called angels were not myths?On Mount Hermon, Enoch witnesses a light that should not exist. Soon, two hundred mysterious Watchers descend from the mountain and enter the human world, bringing knowledge that will transform civilization forever.But knowledge has a price.As Enoch records what he sees, Shemyaza struggles to control the Watchers, while Azazel begins to question every boundary between heaven and earth.The oath has been sworn.The Watchers have descended.And humanity is about to discover what was never meant to be known.