Jessea Lu’s story begins three years ago as she’s floating on the ocean’s surface at Dean’s Blue Hole in the Bahamas. She’s been invited to compete in the world’s top freediving competition. She takes several long exhales and finally one long inhale, then dives into the water. Her intent is to freedive 93 meters to break the current world record that is set at 91 meters. As she glides down into this deep-sea world hundreds of feet below sea level, her organs will compress, the light around her will disappear, and one small mistake could kill her.