On a peaceful and tranquil day, Jerry sits at home reading an advertisement. The ad claims that there is an advanced space station open to mice, featuring not only state-of-the-art facilities but, more importantly, absolutely no cats to cause trouble. While reading the ad, Tom fires guns and sets off bombs, teasing the little guy in every possible way. Unable to bear the disturbance any longer, Jerry resolutely packs his bags and strides toward the space station launch center. Seeing his friend upset, Tom panics and tries every method to beg him to stay, but he can’t stop Jerry from leaving. Afterward, Tom sinks into a low mood and drowns his sorrows in drink. Meanwhile, Jerry, having passed his physical examination, is about to ascend into space with the rocket. Who could have guessed that Tom would also unexpectedly join this journey...