At the graduation party, Lin Xingchen made a wrong phone call and made a "fake confession" to his childhood sweetheart Lu Yan. He only replied, "Look back." Years of tacit understanding suddenly became unbalanced. While she was trying to maintain a long-distance relationship, she unexpectedly discovered ten years of secrets hidden in his old mobile phone - the loss of control on that rainy night was not the starting point of the story, but the final chapter of his long secret love.
