In 2124, human civilization is dominated by the "system". Everyone is awarded a system when they turn eighteen, and the system allocates "professions" based on personal characteristics - warrior, doctor, builder, animal trainer... Behind the seemingly fair society is a precise experiment of human civilization by the "will of the world".
Lin Yue, on the day of his awakening at the age of eighteen, received the first system rated "F" in history - [Garbage Master]. Everyone laughed at him. The system panel read: "Recyclable: paper 0.01Kg, plastic 0.005Kg, metal 0.001Kg..."