Human beings do not evolve naturally, but are experimental subjects released by the "star cage" of advanced civilizations. The universe is an iterative copy nested layer by layer. When each layer of civilization reaches the threshold, it will be pulled into the "iteration space" to complete the science fiction mission set by the high-dimensional civilization. If you fail, your civilization will be cleared; if you win, you will unlock the next level of universe authority until you touch the "real universe".
The protagonist Lin Shen, who was originally a low-level maintenance engineer in the interstellar era, was accidentally involved in the iterative space. He was forced to struggle to survive in science fiction copies such as interstellar battleships, alien ruins, mechanical gods, and quantum illusions, and gradually uncovered the origin of mankind, the truth about star cages, and the ultimate secrets of high-dimensional civilization.