When the sun goes dormant and the earth turns into a glacial purgatory, meteorology intern Xia Xiaoyu is trapped in a 24-hour time loop before the shelter's oxygen supply system collapses. After discovering the three-body sophon conspiracy, she and mechanic Akai go through hundreds of loops and finally use a superconducting barrier to block the signal to break the loop and buy time for human beings to escape from the stars.
