Tong Yu, who had been childhood sweethearts with Yan Xin'er since childhood, immigrated to Canada with her family when Xin'er was 10 years old. For the next 10 years, there was no news. Before leaving, Tong Yu gave Xiner a crystal airplane and promised that he would come back to her and asked her to wait for him to come back. However, will Tong Yu come back in 10 years? What changes did he make when he returned to Xin'er's life?