Two decades ago, Lee Dong Sik (Shin Ha Kyun) was one of the most brilliant detectives in the police force. He seemed destined to become a law enforcement ace. But a mysterious serial murder case turned his life – both in the police force and at home – upside down. He still bears the scars of that fateful case, and has dark secrets he has vowed to tell nobody. He has since gone from hero to zero, and carries out menial tasks at a small police station. But the past will not let him be. A young rising-star detective from a high-profile background named Han Joo Won (Yeo Jin Goo) is sent to the station to oversee Lee Dong Sik while his father attempts to win a bid to become the next national police chief. However, it appears this young rookie also has secrets he’d rather not share. And when a copycat killing with chilling similarities of the murders of 20 years ago takes place, the two men are forced into an alliance – and forces them to face a ghastly conspiracy that may involve high-status public officials. “Beyond Evil” is a 2021 South Korean drama series that was directed by Shim Na Yeon.