In 2077, Blue Star's spiritual energy has been revived for a hundred years, and the whole people have entered the era of awakening. It is compulsory to participate in the power awakening ceremony at the age of 18. The power sequence is divided from F level (waste) to SSS level (god level). Alien beasts invade and secret realms are everywhere. Human beings unite in base cities to survive, and the strong have the absolute right to speak. Lin Mo, 18 years old, is an ordinary high school student in Jiangcheng base city. His parents died from the alien beast wave ten years ago, and he raises his younger sister Lin Xi, who suffers from psychic exhaustion, alone. She has a decisive and aggressive personality, but she is like a younger sister. She criticizes and protects her shortcomings externally, but is gentle and tolerant internally.
