The ancient tree in the city park that has been silent for thousands of years quietly blooms with strange fractals deep in its annual rings. Botanical consultant Yun Qi used a special spectrometer to glimpse the indescribable ancient rhythm flowing in the chlorophyll fluorescence - it was an invisible network woven by roots in the night, quietly spreading a "whisper" that made people sway. Faced with the secret algorithm developed by the Garden Bureau using the genes of ancient trees, Yunqi, armed with a self-made "nutritional regulating fluid", must complete a rescue that affects the city's mind on a rainy night. When the whisper of Cthulhu turns out to be the salvation of an endangered insect, how will she untie the ecological knot of asymmetric symbiosis? An urban legend about listening to the heartbeat of plants and guarding the delicate balance in the urban steel forest quietly unfolds.
