Su Wan, a high school transfer student, became connected with Lu Yang, the "cold-faced academic god", because of a borrowed wrong note. The window seat in the library, the takeout at Cilantro, and the figure who abandoned the game and carried her behind at the sports meeting made the young love grow quietly under the sycamore tree. Best friend Lin Xi recorded the details of the two of them, and found out that Chen Yu was busy being an "assistant". She thought they could have a future together after the college entrance examination, but Lu Yang failed due to a sudden gastroenteritis and was only admitted to the second college in the same city as Su Wan. The two agreed that "the distance is not the distance."
In college, Su Wan was pursued by a senior at a top university. Lu Yang won her heart with his silent protection of winning competitions and repairing equipment late at night; Lin Xi Zhumeng's screenwriter persisted despite repeated rejections; Chen Yu also met and fell in love with top student Zhao Xiaoman through e-sports. But on the eve of graduation, Su Wan was forced to study in the UK by her parents, and she could only break up with Lu Yang in tears, leaving behind a safety button that carried the promise.
Since then, Lu Yang has fallen into a trough, failing in the postgraduate entrance examination and struggling at work. Chen Yu helped him through the trough; Su Wan struggled to grow up in a foreign country, and Lin Xi wrote their story into the script. Three years later, Su Wan returned to China with her talents. When Lu Yang encountered difficulties in starting his own business, she mortgaged her apartment to help him break through the difficulties and used media resources to pave the way for him. Jiang Zhe also offered a helping hand as a partner.
In the end, Lu Yang's company got on the right track and proposed to Su Wan at the celebration banquet; the wedding returned under the sycamore tree, Teacher Zhang witnessed the marriage, Lin Xi's script became a hit, and Chen Yu's e-sports club won the championship. In the wind on a summer night, Su Wan leaned on Lu Yang's shoulder, surrounded by perfect friends. This love that spanned mountains and seas finally formed the warmest echo of youth in persistence and redemption.
