Hidden inside an ordinary-looking psychiatric hospital is a startling secret, one capable of overturning everything the world believes. The protagonist, a doctor there, has been living a routine life. But the wild ramblings of a mysterious patient crash into his quiet world like a boulder into still water, raising a storm.
The patient claims the world is like a giant Mobius strip, with time having neither beginning nor end. The vision Hawking predicted of the world starting over 1.6 billion years from now suggests that humanity has always been trapped in a repeating cycle. He also mentions a drug used by the hospital to treat mental illness, which seems to be tied in countless ways to the world's mysterious cycle and the very nature of humanity. Though his colleagues mock him, the protagonist cannot suppress his curiosity and begins researching ways to modify the drug.
Who could have known that after taking the modified drug, the protagonist's body would die, while his mental power embarked on an unimaginable journey of grafting, crossing hundreds or thousands of years and even more distant eras to possess people from different periods. But this is no wondrous adventure. It is the beginning of agony. The process is beyond his control, his mental power gradually weakens, and every attempt he makes to escape by killing himself only plunges him into a deeper cycle.
Just as the protagonist is on the verge of breaking down, he accidentally enters the domain of an advanced civilization. There, he witnesses a chilling truth: humanity's daily lives, thoughts, and even the development of civilization seem to be controlled by the advanced civilization. Humans are like defective products
