Fan Casting

After the unexplained suicide of her estranged sister, who was one of many who took their lives after the disaster that was Skye Riley's last concert, marine geologist Eden Voss joins a deep-sea expedition investigating seismic anomalies in the Mariana Trench. When a crew member dies in a horrifyingly familiar manner—self-inflicted, smiling—Eden uncovers chilling connections between the tragedy and her sister’s final, cryptic journal entries. As she descends deeper into the mystery, Eden begins to experience nightmarish visions, witnessing grinning figures lurking in reflections and dreams. She soon learns that the entity behind the Smile curse has evolved since gaining the power to affect so many at a time. Determined to end the demon's reign, Eden risks everything to confront the source in a submerged ruin linked to an ancient civilization that once worshipped a god of madness and smiles. But as reality begins to blur and the smiling presence infiltrates her mind, Eden is forced to question whether she's the cure—or just the next host.