Kidnapped and held hostage in a high-speed elevator in a 120-floor building in Shanghai, Aria Wolf has no memory of her past, who her captors are, or what they want from her. Pushed to her limits, she realises she has incredible powers within, and that unlocking these powers is her only chance to escape.

A teenage girl is raised underground by a robot “Mother”, designed to repopulate the earth following an extinction event. But their unique bond is threatened when an inexplicable stranger arrives with alarming news.