Cha Moo Hyuk is a man who was adopted by an Australian family but treated cruelly and then abandoned at a young age. By chance, he meets Song Eun Chae, a fashion coordinator dedicated to her employer, singer Choi Yune. Their meeting will have implications for the rest of Cha Moo Hyuk's life as a devastating turn of events leads him to delve into his past, and ultimately find happiness.

根据金圣钟推理小说《第五列》改编的8集电视剧，국가를 위협하는 세력에 맞서는 형사의 이야기를 그린 추리드라마