In the distant future, humanity has mastered interstellar travel and begun exploring the depths of the Milky Way. A three-person team consisting of a botanist, a geologist, and an artificial intelligence pilot—Aila, Suo'er, and Lina—aboard the advanced research spacecraft Oasis, receives a special mission from the Interstellar Exploration Administration: travel to an unexplored region on the edge of the Milky Way and search for the seeds of a legendary mysterious plant capable of purifying planetary environments.