"Opus" ends with confusing twists about cult survival

The movie "Opus" ends with a shocking twist. After police find Moretti at his piano, it seems he has killed cult members. He is arrested, but the story continues years later with Ariel, who has written a bestselling book about her experience. Ariel visits Moretti in prison, where he reveals she is part of his plan to spread his cult's message. Although she is disturbed, she resolves not to play the role he assigned her. Meanwhile, it is revealed that the supposed victims are alive and promoting the cult. In a final twist, during a talk show appearance, Ariel notices the host wearing a necklace linked to Moretti's cult. The film ends without clarifying Ariel's fate or the cult's future, leaving viewers with unanswered questions.