Kim Soo Hyun (Lee Bo Young) travels back in time to bring her dead child, Han Sa Byul (Kim Yoo Bin) back to life. Han Ji Hoon (Kim Tae Woo) is her husband, a human rights lawyer who’s passionate about his work.

Meanwhile, Ki Dong Chan (Cho Seung Woo) is a private investigator who helps her when she goes back in time. Hyun Woo Jin (Jung Gyu Woon) is Kim Soo Hyun’s first love, a detective in the violent crimes division.

金秀炫的女兒韓新星遭綁架撕票。秀炫偶爾發現能力，回到案發前兩周，就決定拯救女兒。幫助她的是奇東燦，前警察變成了私家偵探。其弟被誤控殺害東燦前女友，他誓要洗脫弱智弟弟的嫌疑。秀炫和東燦揭露凶險秘密…