Dr. Voss and her crew—Captain Jax, a gruff ex-navy veteran, and Lila, a tech-savvy diver obsessed with the occult—board the wreck in a second ship, the Horizon . As they explore, strange occurrences begin: compasses spin, radios pick up static voices singing in a language no one recognizes, and crew members report a “female figure in white” at the doorways.