Professor Ren Xinzheng resigns to start a mentoring class for traditional Chinese medicine, hoping to train true successors. His students—Sun Toutou, his son Ren Tianzhen, lawyer-turned-student Yang Xiaohong, pediatrician Peng Shiyan, and aspiring doctor Zhao Liquan—struggle to get along, but must work through their differences to preserve the legacy of Chinese medicine.
The lives of a college student and a video game designer are kept being reset after an explosion on a bus. During each reset, they have to work together to find out what the reason for the explosion is. Will these two be able to save themselves and their fellow passengers? Will they be able to close the time-loop?