41St Kind of Laughter

In 2187 AD, humans relied on helium-3 nuclear fusion to move beyond the Earth and built mining outposts in the orbit of Jupiter. Stillwater Station, 42 people. Closed, lonely, and three days' flight away from the nearest support point. In the early morning of the seventh day, Marvin, a member of the scientific expedition team who had been missing for seven days, returned - wearing the work clothes he had on the day he disappeared, unscathed and smiling exactly the same. He remembered his daughter's name, his old habits, everything. But he didn't remember how sad he should be when he mentioned his daughter. The doctor at the station said that his cells were brand new, like a machine that had just come off the assembly line. What's even scarier is that no one noticed anything was wrong. Except for one person. Eno, the security officer at Stillwater Station, is a former Deep Space Security Agency investigator. Three years ago, his sister died of a strange disease on earth called "memory disaster" - a disease that makes people completely forget who they are. Now, he received a message from "himself" in his communication terminal: "Don't trust any face you see. Including mine." But the scar on the back of his hand that should have healed long ago was still reminding him—— Perhaps, even he himself is no longer the same person. When danger learns to imitate humans perfectly, what do you have to prove, you or you?