"Mystery Queen" ended with a perfect open ending. The final episode which seemed to find the secret to everything, ended with a strong hint of a second season.
On the final episode of the KBS 2TV drama "Mystery Queen", Ha Wan-seung (Kwon Sang-woo) and Yoo Seol-ok (Choi Kang-hee) tracked down the real story behind Seo Hyeon-soo's death and the death of Yoo Seol-ok's parents.
Ha Wan-seuk quit being a police when Yoo Seol-ok got hurt and joined in father Ha Jae-ho (Jang Gwang) in his office. However, this was to avoid his father's eyes and closely investigate Seo Hyeon-soo's case. Ha Wan-seung and Yoo Seol-ok were trying to bring out a case that was statute-barred for a long time.