Childhood sweethearts Shang Kai and Jiang Manman grew up side by side in a mountain village in the 1990s.
When their university admission letters arrived, she chose to stay in the village to care for her gravely ill mother, while he left for the city.
Years later, he returned successful in his career, but she was already married.
As she lay gravely ill, watching ginkgo leaves drift down, she dialed the number she hadn't called in twenty years.
The boy and the old man beneath the ginkgo tree both remembered: "Before the last leaf falls, I'll be back."
