Shen Zhixu, an arrogant and rational genius scientist. When the apocalypse breaks out, the world has become a paradise for the infected. Her only obsession is to find the assistant Zhou Heng who turned into an "inhuman" to save her. Zhou Heng was injected with an unfinished experimental drug. Although she retained her sanity, she was losing her memory step by step. Her body was disintegrating in the toxicity. Only in the light could her love for Shen Zhixu be preserved for a short time. They embark on a journey north to find a base, a race against time. Zhou Heng's memory passed like an hourglass. She desperately grabbed every second about Shen Zhixu, while Shen Zhixu tried his best to carve her name into his soul. In this game of life and death, forgetting and remembering, can their love become the light that will never go out in the dark end of the world? Open this book and witness an extremely deep love blooming in the ruins of despair.