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In a haunting investigation that spans 15 years, three determined individuals seek justice for a brutal murder that changed their lives forever. Kim Young Goon (Seo Kang Joon), an aloof police officer, joins the investigation unit of hardened cop Do Chi Gwang (Han Suk Kyu), driven by traumatic memories from the past. Do Chi Gwang has long battled police corruption in his relentless pursuit of truth. They are soon joined by Han Tae Joo (Kim Hyun Joo), a former prosecutor turned lawyer, as they work together to unravel the mysterious events that have shaped their destinies. As they dig deeper, they confront dark secrets that threaten to expose long-buried truths. This is a 2019 Korean drama directed by Ahn Gil Ho.