The lonely girl unexpectedly became an angel from a sudden car accident... Although the girl once longed to become an angel... But she realized when she actually became an angel... It turns out that the Kingdom of Angels is not as beautiful as a fairy tale... However, when she accidentally entered the darkness, she discovered... It turns out that the legendary demons are not that evil... Instead, they have a grateful heart... When the lonely girl has another chance to choose... Will she choose to stay in the Kingdom of Angels or fall into darkness? The battle between darkness and light is going on...