Guided by Dustin, the surviving guards, along with Grace and Judith, dove into the icy pool one after another. They swam through the dark underwater passage, heading toward the unknown. The tunnel was short, only about 200 feet in length.

A dim light soon appeared ahead. Everyone swam toward it with all their strength, breaching what felt like a thin, silken veil of water before their heads emerged above the surface. What greeted them was an enormous naturally formed cavern.

Countless stalacti