After thousands of years imprisoned in the Abyss, the fallen angels known as the Watchers are on the loose. Jared Lorn and Grace Fortune have also escaped from prison, but all they want to do is get home to their family. Dark forces conspire against them, and soon they find themselves on a perilous journey to the Other Side, the spiritual realm.

They must battle the Watcher Samyaza and his cohorts to escape, not knowing that the leader of the Watchers, Azazel, has taken control of the real world and subjugated all nations to his will. Soon they must join the few that are left standing against this worldwide evil, those that have not given in, known as the Forbidden.