The drama is adapted from the novel of the same name by Qidianjun. It tells the story of game architect Xiao Heyun (played by Bai Jingting) and college student Li Shiqing (played by Zhao Jinmai) who "resurrected from the dead" after a bus explosion, and constantly experienced time loops during the period of the bus accident, from getting off the bus to save themselves to breaking down barriers and fighting side by side, trying to stop the explosion and find the truth.