Tells of two groups of people stuck in a time loop where they keep returning to the beginning of a day or incident. In part one, Li Shi Qing experiences death over and over again on a bus, with each loop sending her back to the bus and back in time. To get off the bus, she accidentally dragged fellow passenger Xiao He Yun into the time loop. The two must try everything to make sure the bus gets to its destination safely to close the time loop.