In 2122, when nuclear winter was shrouded, scavenger Leng Xuan found a glowing star map chip in the rusted satellite debris. At the same time, mechanic Zhao Heng's prosthetic eye suddenly received repeated Morse code - the signal source came from the wreckage of the "Ark" space station buried by a sandstorm. When the two met at an abandoned transmission tower, the chip projected a strange scene: he was inserting the same chip into the console seven days ago, and the mutant sandworm crawling in the desert actually had the same cycle date engraved on its shell. What's even more shocking is that Zhao Heng's prosthetic eye record shows that they have died 17 times in the cycle of "Searching for the Ark", and each death will cause the wasteland time to rewind to the dawn of the seventh day. Leng Xuan found star debris text in the cracks of the chip: "Humans used the debris of the space station to weave a doomsday cage." When the seventh sandstorm swallowed the launch tower, they finally deciphered the truth - the so-called doomsday survival was nothing more than a time loop experiment created by advanced civilizations using the energy of star debris, and every restart was a cruel deduction of human beings' desire to survive.