27-Year-old Su Niannian thought she had been living an ordinary life, but she often felt that she had forgotten a very important person until she fell into a whirlpool of dreams. She returned to the math class in her sophomore year of high school, and she became a 17-year-old high school girl, but everything seemed to be different from the high school years in her memory. The friends she thought were actually not friends, and the lovers she thought were not actually lovers. She kept revising her memory, but found that everything was just a reappearance of the past, and was she 17 or 27? Where are her friends and lovers?
Concept: Sometimes people can't distinguish between reality and dreams