This story follows Lin Chen, who struggles to survive alone until he unexpectedly obtains a crystal containing the laws of time, awakening the abilities to rewind and pause time. He saves a separated mother and daughter, Su Qing and Xiao Ya, and the three travel together. Along their journey to reunite with their family, they discover an even more powerful crystal and uncover the truth behind an alien invasion beyond the gray mist. Lin Chen gathers the survivors and uses the power of both crystals to purify the gray mist and rebuild their home. Not only does he reunite with his parents after fifteen years apart, but he also transforms from a displaced survivor in the apocalypse into Earth's guardian, achieving redemption for both himself and the world.