Hu Tao accidentally discovers that the supplies in her pocket watch space have mysteriously vanished. At the same time, Zhou Yancang is holding the last vial of vaccine—humanity’s final hope—while desperately defending the last human base as it runs out of ammunition and food. Just when all seems lost, he miraculously receives life-saving supplies from Hu Tao.
Upon learning that Zhou Yancang is trapped in a post-apocalyptic world, Hu Tao, out of kindness, sends him more food. In return, Zhou offers her gold and treasures from his world. As their exchange deepens, Hu Tao discovers an extraordinary ability: she can now travel through time and space. She begins to find advanced technological weapons, blueprints, and tools from the future.
Just as Hu Tao and Zhou believe humanity is on the verge of victory, a mad scientist named Samuel unveils a doomsday plot—to wipe out the entire human base using a devastating weather weapon. Simultaneously, Hu Tao faces a massive fire threatening to destroy her own city. Thi