This is the future. When most people have given up life on earth and live on Mars or the moon, the earth will usher in its most bloody moment. People will fight for a little bit of living space. The protagonist of this play originally lived a pampered life on Mars, but came to Earth to develop kung fu skills. It also brought about brutal killings on the earth. When his good friends and loved ones left one after another, he repented and wholeheartedly supported the peace of the earth and transformed the earth's space.