From spring to winter, it is one year for trees and a lifetime for flowers. A lonely tree meets a newly born flower and begins to think about the meaning of life. Why do we exist? Can we leave our own trace? During the course of the questions and answers between the two, the flower sprouts, blooms and withers, while the tree experiences budding, lush growth and falling leaves. They are remembered by each other and become warm memories in life forever. The tree and the flower have also found their belongings and the meaning of their lives.