Han Jisung is a successful captain and head of the Special Investigations Department in Vancouver. He carries the weight of multiple unsolved murder cases that haunt the city, his reputation, and his own conscience. Despite his sharp wit and relentless energy, the case has reached a dead end. When Police Chief Lee Minho from Seattle arrives to assist, Jisung is both relieved and wary — their collaboration might be the only way to crack the case, but it also forces Jisung to confront his own fears of failure.