After escaping, she encounters Kyung-hee (Park Eun-bin) and her brother Dae-gil , who take her in and provide a glimpse of a normal life on their farm.

Her freedom is short-lived as multiple factions descend on the farm to capture or kill her, including:

A group of superpowered assassins known as the "Tou" or "The Disciples".

The story begins with a young girl (codenamed Ark 1 Datum point , played by Shin Si-ah ) waking up in "The Ark," a massive secret laboratory, following a violent raid that leaves everyone else dead.