Troublemaker Hye-yeoung is a fearless 19-year-old girl with a dragon tattooed on her arm. Her single father gets into a mysterious car accident and falls into a coma, leaving Hye-yeong and her young sister all alone. Hye-yeong begins to investigate her father's case and uncovers the truth behind the suspicious accident. Furious at how unfair the world is, she hops on a bulldozer to express rage.