A brutal murder committed 15 years ago turned three lives upside down. A decade and a half later, the trio – brought together by fate – goes on the hunt for answers. Kim Young Goon (Seo Kang Joon), a police officer who may be considered aloof and uncaring, joins an investigation unit headed by hardened long-time cop Do Chi Gwang (Han Suk Kyu). The nightmarish events 15 years ago still haunt Kim Young Koon – but his memories also provide no shortage of motivation. Do Chi Gwang, meanwhile, has led a quest to uncover widespread corruption as part of his unswerving pursuit of justice – a quest that has won him few friends in the police force. They are eventually joined by Han Tae Joo (Kim Hyun Joo), a former prosecutor who has become a lawyer. Will the trio unearth the truth about the fateful event that has shaped their destiny? And what dark secrets will they uncover along their way? “Watcher” is a 2019 Korean drama directed by Ahn Gil Ho.