When Feng Shuxing was 14 years old, his dearest grandmother left him. He had no choice but to leave his hometown and go to the United States to live with his father. This means that he will be separated from his childhood sweetheart. Lin Haiquan was his childhood sweetheart. In order to stop his tears, the two of them made an agreement that Feng Shuxing would definitely return to Haiquan in 10 years. For this agreement, Feng Shuxing agreed to his father's demanding requirements in study. When he finally returned home, he found that Lin Haiquan had already moved out of his old residence. In a chance encounter, he met again Lin Haiquan, whom he had been missing for 10 years, but Haiquan could not think of him. What happened in the ten years he was gone?