In the distant future, humanity has already mastered the technology of interstellar navigation, but there are still many unsolved mysteries in the universe. A small scientific research ship named "Echo" discovered a mysterious signal from an ancient civilization at the edge of the Milky Way. The signal contains a beautiful melody, seemingly guiding in a certain direction. Captain Lin Feng, botanist Su Li, and artificial intelligence assistant Xiao Xing decided to embark on this journey to find the "Lost Garden". They believe that the ultimate answer to the origin of universe life is hidden there.