Satellite Wei Xin crashed into antiquity due to a solar storm, turning into human form upon waking up, unexpectedly becoming a one-of-a-kind satellite sprite. Trapped in the deep mountains with exhausted energy, he was fortunately rescued at the cost of her life by a young girl named Ye Yuxi. To repay her life-saving grace, Wei Xin stayed by Ye Yuxi's side, relying on the satellite's built-in remote sensing and observation capabilities to predict natural disasters, find people and search for objects, and even see through the true forms of demons and monsters in the world. Mountain ghosts making trouble, Taoist priests making things difficult, water ghosts running amok, and the Dragon King of the Great Marsh manifesting, demon disasters swept through Taiping Prefecture one after another. While sunbathing to recharge his solar energy and sustain his power, he protected Ye Yuxi, slaying demons and breaking through predicaments in the mortal world of Dahong where humans and monsters mingled, resisting the surging tide of ghosts from the Great Marsh.