One day in 2037, everyone suddenly received a strange pair of glasses. Some people found that these glasses were very similar to VR, which allowed people to enter another space. People who had lost loved ones could see their deceased relatives in it, and they could set the space to any scene they wanted. After using it once, a code would appear on their hands. Most people entered this space out of curiosity or other choices. A few people never used it because they were afraid of unknown things, until one day...
Concept: scientific concept