Xia Yin, a female college student who has the ability to go back to the short past, in order to save her best friend Lin Anli, who she met in troubled times, also has the ability to temporarily predict the future.
An accidental triggering of the opportunity to change the past world line and return to a year before the end.
Xia Yin and Lin Anli also met early in the peaceful era, gradually learned about each other's past, and gradually became able to connect with each other and understand each other as they got along.
The two people continue to plan for the coming disaster, slowly discovering and uncovering the causes and truth of the apocalypse, and they are increasingly able to understand the insignificance of human beings themselves, and how difficult it is to survive when the disaster really comes.
Through the prediction and redemption of two people, they change the world around them little by little, struggling to find a balance between preserving themselves and saving others. They become each other's hope and courage, bravely facing the coming of the end, and solving all the judgments of cause and effect...
Concept: association based on human nature and reality