In Shanghai in 2075, the life of space architect Lin Shen was completely broken by a series of anomalies in the entrance hall of his home. From the strange "space anchor" warning on the scale, to the mysterious express delivery that disappeared out of thin air, to the distorted pixel noise in the smart mirror, various signs indicate that the door he enters and exits daily is becoming a dangerous node connecting unknown time and space.
As the investigation deepened, Lin Shen discovered that an unstable "space-time rift" had appeared at the entrance. Not only does he have to face mysterious warnings from the future, but he also has to fight against "time and space hunters" who try to use cracks to steal future technology. With the help of mysterious allies, Lin Shen must use his professional knowledge to completely close the crack before it expands and causes space collapse, endangering the entire city.
This is a time and space game surrounding a home door, and it is also a science fiction story about protection, choice and the future of human civilization. The entrance is no longer just the entrance to the home, but the critical point that determines the survival of the world.
