Daemul follows the journey of Seo Hye-rim, a passionate and righteous news anchor who enters the world of politics after the tragic death of her husband in a war zone. Driven by a desire to change the corrupt system and fight for the rights of the common people, she rises through the ranks from a local assemblywoman to the highest office in the nation. Her path is fraught with political intrigue, betrayal, and intense opposition from powerful figures who seek to maintain the status quo. As she navigates the treacherous landscape of South Korean politics, she forms a complex alliance with Ha Do-ya, a talented and hot-tempered prosecutor who is determined to bring down the corrupt elite. Together, they confront the machinations of Kang Tae-san, a brilliant but ruthless politician who will stop at nothing to achieve his own presidential ambitions. The series explores themes of justice, leadership, and the personal sacrifices required to serve the public good in a volatile political climate.