Arno Aslanov is a 26 year old spy who has been allocated at a high school to investigate the suspicious disappearance of Governor Official Park Eun-Woo, but when a student finds out about his assignment his whole world is turned upside down. Meanwhile Seo Minho (the kids who found out) is living the life, with Arno running arrands all day all night to not have his secret spilled, But as the days progress Arno Aslanov starts feeling uneasy, about the mission and Seo Minho.