Watch The Heretics full movie online Movies123. Watch The Heretics 123movies online for free. The Heretics 123Movies: A young girl is abducted by a man, who claims that a cult is hunting her. His goal is to protect her until sunrise but while restrained, the young girl falls deathly ill. While her friends and family search for her, the source of her illness becomes more and more apparent. She’s not sick…she’s changing.