The main character, Yoon-byul, had a unique trait where a part of her body weighed nothing and floated in the air. Due to this, she was studied and detained in a facility until she was of high school age and allowed to attend a normal school. Nevertheless, an illegal group plots to abduct Yoon-byul, resulting in a clash between the institute and criminals. The tale also delves into Yoon-byul's experience of adapting to ordinary life.