As leader of a crime investigation team, Han Tae Joo has propelled his career and risen through the ranks by trusting data over all else. One day, while investigating a serial murder case, he has an accident. When he wakes up, he suddenly finds himself in the winter of 1988.

翻拍自同名英剧，讲述了因突发事故而穿越回到过去的刑警为了回归自己原先的生活而解决连环杀人案的故事。