In the distant future, humanity has entered a new era of deep space exploration. Young scientist Su Chen and his AI partner Xing Li, piloting the small scientific research ship "Roamer", carry out missions of collecting and studying strange cosmic life samples among the star sea. They do not pursue conquest, only craving understanding; they carry no weapons, only harboring curiosity. During a routine patrol, they received a faint signal from an unknown region, which was not a cry for help, but a "Stardust Song" composed of pure energy.