The year is 1969. Henry Conroy is a minister in an American doomsday cult based in England. Becoming a father for the first time, Henry moves his family home to Australia where his wife, Elizabeth, is reunited with her parents and pregnant, sickly sister. When, as a result of their beliefs the family suffer a series of avoidable tragedies, Henry begins to question the true character of his leader. Elizabeth, however, driven by grief and guilt holds ever tight to her faith and, even after a harrowing encounter with the man she and her husband once so revered, refuses to face the shocking truth. Disheartened by failed prophecies and impelled by disturbing rumours of sexual abuse, a defiant Henry relocates the family to church headquarters in California. There, he faces an agonising choice between continuing to live a lie and the possibility of losing his family forever.