Ning Yao, the daughter of a botany professor, is accustomed to using plant specimens to record her thoughts. Gu Chen, a taciturn transfer student, projects all the frustrations in life onto cold mechanical parts. An encounter caused by a ginkgo leaf specimen made two teenagers with very different personalities walk side by side in a biology competition group, and their life trajectories began to intersect. However, a family accident separated them, leaving behind unfinished leaf vein specimens and green promises.
Three years later, they reunited in college. She became the "plant killer" of the Horticulture Department, and he became the "cold assistant" of the Architecture Department. The grudges of the past made them cautious, but they were once again bound by fate in projects such as the protection of ancient trees and the reconstruction of botanical gardens. From the youthful temptations in high school, to the estrangement of reunion in college, to fighting side by side in the workplace, they use their professional knowledge to mend the cracks in life, looking for an emotional "symbiosis system" in the growth of plants and the structure of buildings.
When "annual rings" become the mark of their love, how will this youthful agreement that began in the herbarium eventually bear fruit?
Concept: In the soil of time and growth, love is a symbiotic system that allows two souls to depend on each other like plants but grow independently.