The drama tells the story of Sakura Mita, a strange girl who volunteered to be assigned to the simple and unattended Metropolitan Police Department's Unidentified Persons Consultation Room, and her classmate Shin Tsukimoto, who is 10 years older than her. The two have completely opposite personalities and interests. The bright and innocent Sakura and the calm and composed Shin blame each other as soon as they meet, but they want to bring more unidentified people back to their families anyway, and solve the mystery with the little clues left on the bodies.