Lin Beixing looks at the "I like you" sent on Zhang Wansen's old mobile phone and knows that this is the last chance. Lin Beixing returns to high school again with mixed feelings, but this time Lin Beixing finds herself in the first year of high school. Lin Beixing re-acquaints Zhang Wansen and secretly completes the regrets he had in the past. She finds out that the "I like you", had been in Zhang Wansen's draft box since the first year of high school.