Heather and Phil continue their deep dive into Nazi occult activity in nearby Poland, where they investigate Nazi strongholds that harbor terrifying secrets. Their search suddenly leads them to a man-made network of tunnels hiding supernatural relics.

Heather and Phil travel to the ancient Mayan city of Xunantunich in search of a spirit named the Stone Lady. But these aged ruins carry more threats besides vengeful spirits -- poisonous snakes, scorpions, and tunnels on the verge of collapse up the ante.