

Stel and Jess investigate a golden grave that could be a king of Atlantis.

In Croatia, Stel and Jess dive for relics and find evidence of a lost city.

Stel and Jess investigate cave paintings in Turkey that match an advanced civilization that built the world's oldest city. Tracing their ancient migration to the coast they discover a shifted shoreline and ruins of a lost city right under their feet.

On Europe's largest active volcano, Stel and Jess discover a trail of destruction back to the time of Atlantis, leading them into a hidden labyrinth under a coastal town and to a sunken monolith that may hide the remains of the legendary lost city.