After stepping through a glowing portal, Gisela wakes up in an unfamiliar room. When trying to piece together where in the world she is, a horrifying realization hits her: She isn't on Earth at all!

Gisela vividly remembers smashing her necklace and fighting with Auri. So when she finds herself at his residence, she has burning questions: Was Auri the one who brought her here? And, just as importantly, where was he?

Although everything around her is different, Gisela is overwhelmed by a sense of familiarity. Something about this planet-Atlantida-is calling out to her, but she doesn't know how to respond.

She reluctantly teams up with Lucien, who offers to take her to a place she thought only existed in her memory. Each step she takes to unlock her past threatens to unravel who and what she truly is.

What she discovers makes her see Lucien in a new light, while Auri's absence from Atlantida only raises doubts about his true intentions. And yet, Gisela is unwilling to risk their connection without hard evidence.

Meanwhile, Sophia continues to run their business on Earth and engages in a desperate search for Gisela. With help from a group of unlikely allies, she tackles the mystery surrounding her friend's disappearance and the foreigners.

Finally ready to confront her past, Gisela will stop at nothing to get answers. Her persistence, however, comes at a cost and puts the lives of her loved ones at risk.

Will Gisela find the answers she's looking for? Or will the dangers of opening these doors catch up to her before she even has the chance?