Lee Joo Sil has passed away at 80 ... the mother of undercover detective Hwang Joon-ho (played by Wi Ha Joon) and the stepmother of Hwang In-ho (played by Lee Byung-hun), in the second season ...
Lee Joo-Sil was 81. Her final role, according to IMDb, was in Squid Game. She portrayed the mother of undercover detective Hwang Joon-Ho (Wi Ha Joon) and the stepmother of Hwang In-Ho (Lee Byung-Hun).