Good grief, this customer isn’t human! An ordinary man named Baizhu accidentally wanders into a flower shop, only to discover that its owner, Mu Hao, is no ordinary human. The shop’s customers include people, ghosts, and monsters. Not everyone can see the shop; those who can enter are fated to find it. So the owner, Mu Hao, invites Baizhu to stay and work for him.
During his time on the job, Baizhu encounters one strange tale after another, some tragic, some joyful, brought about by unusual plants and flowers such as resurrection grass, beauty-restoring flowers, immortality grass, ghost grass, and dream grass. They go through many things together, and Baizhu learns about Mu Hao’s extraordinary past. Then he discovers that he, too, is no ordinary person: he is an immortal herb born of nature itself. His bond with Mu Hao began with them saving each other a thousand years ago, and has been tangled ever since.
Among the many stories they encounter is a mysterious person connected to Mu Hao’s origins. They draw ever closer, trying to get what they want from Mu Hao. How will the two of them contend with this mysterious figure?