Dr. Shamus Bergin lands a coveted position of Staff Psychologist in the Secure Treatment Unit of a mental hospital right out of school. He is soon vexed by an amnesiac patient who defies clinical diagnosis and whom every other doctor has written off. Inconsistencies about the man's origins intersect with Shamus's own doubts that the patient even belongs in an institution.

As his own investigation continues to be met with redacted files and evasion from governmental agencies, the doctor-patient relationship suddenly undergoes a radical shift. The patient discloses that he has time travelled from a forgotten Age of Loura to seek help from modern day members of The Sacred Order of Keepers to find the last living angel. Only the angel can turn the tide in the ultimate struggle between good and evil in this deliberately erased timeline 20,000 years in the past. With his parents tragically lost in a boating accident a decade earlier, Shamus must turn to his one true friend, Dr. John Browse, to make sense of the voices within which are calling him to action.

With career and grip on sanity at stake, Shamus must decide whether he has succumbed to the delusions of a sick mind or whether he should take a leap of faith and help the man achieve his mission.