A girl with no memory escapes from a heavily secured laboratory in the middle of the night. She finds herself in a world unfamiliar and threatening, yet she possesses extraordinary powers that she doesn't fully understand. Stumbling upon a group of researchers and operatives who are relentlessly pursuing other individuals like her, she unwittingly becomes the center of a dangerous conspiracy. Along her journey, she encounters Kyung-hee, a kind-hearted woman, and Dae-gil, her quirky brother. The siblings decide to take her in, providing temporary refuge and warmth for the confused girl. However, their safety is short-lived as they come to realize the girl’s past is catching up quickly.

Meanwhile, Dr. Baek and a mysterious organization desperately seek the girl for their own sinister purposes. As the truth about her identity and the reason she was created begins to unfold, unsettling revelations surface that could lead to catastrophic consequences for the world. Throughout the chaos, bonds are formed and tested as allies and adversaries challenge the fledgling friendships. Those hunting her will stop at nothing to reclaim their creation, but unexpected alliances arise as others who share similar abilities emerge. The young girl must decide where she stands amidst this escalating conflict, and whether to embrace or reject her powers. The deeply rooted secrets threaten to change everything for everyone involved.