무경서로 전입 온 한서경B.
그리고 B세계에서 A세계 피해자들의 행방을 찾기 시작한 서도원A.
무경서에는 새로운 실종 사건이 접수되고 실종 사건의 유력 용의자를 쫓던 중, 도원은 예기치 못한 인물과 만나게 되는데..
The Seo Kyung of World B transfers to Mukyeong Police Station. Do Won of World A starts his search for the victims of his last case before coming to World B, the Mukyeong Station Serial Murder. Meanwhile, a new missing person case comes into Mukyeong Police Station, and Do Won runs into an unexpected person while chasing down a key suspect.
生死交錯的世界
調來無經署的韓書景B。在B世界的徐道元A開始尋找A世界被害人的下落。無經署受理了新的失蹤案，在追查失蹤案的重大嫌犯中，道元見到了意想不到的人物⋯
