A group of four friends decides to enjoy a vacation at the beach, and to add a bit of excitement to their trip, they decide to explore some ancient Mayan ruins submerged at the bottom of the ocean. What starts as a fun adventure quickly turns into a struggle for survival when they find themselves trapped in an underwater cave and realize they are not alone.
As they try to find a way out, the tension mounts when they discover that a group of imposing sharks is lurking in the dark waters. Without warning, the situation turns terrifying: every decision becomes critical, and time is running out. With their oxygen dwindling and danger lurking in the shadows, the girls must rely on their wit and courage to survive.
As claustrophobia and panic grow, their friendship will be tested in ways they never imagined. Each one will confront fears and personal secrets that emerge amid the anguish. The struggle between the will to live and the fearful imminence of death becomes the center of the story, as the protagonists attempt not only to find a way to escape but also to overcome the inner demons that often haunt them. Will they manage to reach the surface, or will they become part of the dark mystery that lurks in those depths?