In 2100, the ozone layer bursts, strong ultraviolet rays devour surface vegetation, and humans are trapped underground, relying on synthetic food to survive. Plant geneticist {Su Wan}'s Green Bud Laboratory has been researching UV-resistant plants for many years to no avail, until she discovered a surviving ancient seed from an ancient glacier sample. After genetic modification, the seeds sprouted from the ground, but unexpectedly awakened the ability to swallow metal. Laboratory executives covet its weapon value and want to turn it into a weapon of war. In order to protect the hope of human beings returning to the surface, Su Wan escaped from the laboratory with the seeds and embarked on a dangerous journey to the ruins of the equatorial rainforest. The pursuit of desert bandits, the siege of lab pursuers, and the emergence of the "green network" of mysterious plant consciousness beneath the earth's surface all involve her in a game about the future of humans and plants. When the truth is revealed, the ancient seeds are actually the core of the Green Network. Su Wan's choice will determine the path of humankind's survival.
