On May 16, 2014, a murder occurred in the residential area of Seocho-dong. The wife of Gao Donghao (played by Sun Hyun-joo) Zhao Yanxiu (played by Yan Zhiyuan) was found dead at home, and the murderer has not been arrested. Donghao was frustrated in his life after his wife was killed. He was depressed all day and couldn't extricate himself. His only daughter Gao Jinglin was also tortured by her father's depression. One day a year later, due to an abnormal magnetic field, Donghao found that he could talk to his wife a year ago on the phone, and got a clue to save his wife's life from the call, and he only had one day. Donghao was determined to seize this opportunity to change his fate and fought alone to save his wife.