"Returning on a Rainy Night": In the last days of the world, acid rain continues. Lin Yutong awakens the power to purify rainwater and hides in an abandoned library. One day, she rescued reporter Gu Yun who was injured in the rain. Gu Yun recorded the suffering and hope of the end of the world. The two of them took the purified rainwater and escorted the old and the weak to find shelter from the rain in the underground city. Yutong's superpower became a way to survive, and Gu Yun's company became her destination.
