After Su Wan, a social worker, resigned, she received a bronze flowerpot and half a volume of fragments of "The Classic of Mountains and Seas" left by her grandmother in a rental house in the old city. She unexpectedly discovered that the seeds spawned from the scraps of leaves actually grew Zhu Yucao, which "cannot be hungry", and also attracted the human-like Dangkang cub. The mysterious neighbor Lu Shiyan always appears when she "gets into trouble" - Baize who helps her hide the balcony, and the commercial company who arranges for her coveted crops. As more crops from the mountains and seas were planted, Su Wan discovered that the broken pages contained clues to her grandmother's disappearance. Lu Shiyan's family had guarded the "boundary between the city and the mountains and the sea" for generations. While cultivating "mini mountain and sea farms" on balconies and rooftops, the two fought against villains who destroyed the barrier, and eventually planted an ancient secret realm in the city to protect the world.
