In order to find the lost energy core, the time traveler Qingkong came to Earth and met Yi Xinran, a passionate and simple female college student.Yi Xinran, who unexpectedly obtained the core of energy, traveled through time and space again and again, helped many friends, and fell in love with Qingkong.However, what Yi Xinran didn't know was that every time she traveled through time, she would consume the energy of Qingkong.Qingkong's body is becoming increasingly weak and facing the danger of annihilation.Yi Xinran finally learned the truth and apologized to Qingkong with heartache, determined to help Qingkong return to his original world, but Qingkong disagreed. He wanted to spend this last time happily with Yi Xinran.Just when the two couldn't make a decision, Yi Xinran was pushed down from the tall building by her classmate Bai Xianyu, who had always been jealous of her.In order to save Yi Xinran, Qingkong returned to the past that the two had not met, thus erasing Yi Xinran’s memory of himself.Qingkong left the earth and Yi Xinran, but he didn't know that the memory of love was buried deep in Yi Xinran's heart.
