Hwang Seyoun started her literary career as a fiction writer in her mid-20s after her short mystery story was selected to win the Shinchun Munye Literary Award. After publishing several books, Hwang worked as an editor at a publishing company. While working for the company, she stopped all writing activities with the exception of the mystery quiz series on the homepage of National Intelligence Service Korea. Losing her job due to a company merger, Hwang took this as an opportunity to pursue her dreams as a writer. She has not stopped writing ever since.