In an imaginary future world, humans have lost their last habitat on earth. The only remaining humans on Earth sail into outer space aboard the spaceship Discovery.
Fang Shaozhe accidentally discovered a secret in the library, and behind the secret was an unspeakable truth. At the same time, Lin Yu also fell into quagmire because the truth was discovered. Should we reveal the truth or hide the truth? Choose family or lovers. Where will the spaceship carry the last human beings?