Yao Li, an ordinary office worker, had a strange dream one day, in which creatures that could not exist in the human world appeared. He was very disgusted with his current life and was looking forward to what happened in this dream. When he woke up from the dream and returned to reality, he was inevitably disappointed. However, after hearing the voice of the person passing by him in the elevator was similar to the word "Yao Li" in his dream, he vaguely felt that "today" that should have repeated the same "yesterday" seemed slightly different...