In 2033, humanity's plan to block an asteroid from hitting the earth failed, and humanity perished, while Duguyue, a medium animal researcher who was forgotten on the moon, was lucky to survive and became the last human in the universe. He began to exercise, explore the base, and unknowingly make his lonely life on the moon a pleasure. Unbeknownst to him, however, the base cameras transmitted his footage back to Earth, where surviving humans around the globe watched his life on the moon live and saw him as a role model. Until one day, he noticed that there was a tooth mark on the cake that he had not touched... Could it be that there is anything else on the moon?