Song Tie, an ordinary young man who loves to read novels and exercise, suddenly traveled to a strange time and space when he went out to make soy sauce. He found that not only was his soul attached to someone else, but he also had to complete a mysterious task to survive. This world is no longer the Earth he is familiar with: a catastrophe in 2125 split the earth into four suspended fragments, the flow of time was halved, civilization fell apart, and the population dropped sharply. Today, this is the M world - a sub-time and space era composed of the Dragon Kingdom, the Star Kingdom, the Holy Kingdom and the Northern Kingdom. Each kingdom hides dimensional puzzles related to ancient secrets.
The indifferent robot Ling (number 080) was ordered to monitor Song Tie, but during the mission, he gradually revealed his differences from ordinary robots. On the outside, he keeps away from strangers, but on the inside he is delicate and gentle, and is even willing to break procedural restrictions for Song Tie.
"If this is all a lie, will you still believe me?" - Ling (No. 080)
As the two explore the Four Realms, they discover that the truth behind their search for ancient secrets is not simple. As the mystery gradually unfolded, Song Tie discovered that he was inextricably linked to the identity of the original owner, and behind Ling's early model number 080, there was also a secret hidden that could change the pattern of sub-time and space.
