Synopsis：In 2005, the newlywed Jiang Qianxi told her husband, “I’ll be back by dawn,” but an accident caused her to fall into a crack in time and space. When she woke up twenty-one years later, she discovered that she had long been declared dead, and the young husband she deeply loved had become a weathered 44-year-old man. When she finally dialed that familiar number, the person who turned around was no longer the 21-year-old young man in her memories, but a 44-year-old stranger marked by the hardships of time. Dawn has come, and she is back—but is he still her Gu Chi?