"Jill Heinerth-the first person in history to dive deep into an Antarctic iceberg and leader of a team that discovered the ancient watery remains of Mayan civilizations-has descended farther into the inner depths of our planet than any other woman. She takes us into the harrowing split-second decisions that determine whether a diver makes it back to safety, the prejudices that prevent women from pursuing careers underwater, and her endeavor to recover...

Two divers break a world record for depth in a 283-meter cave. Before surfacing up, they find a body. They decide to come back and retrieve it.