A couple (Zhang Jingsheng & Lu Liping) robbed the money train for money, causing a canister truck carrying highly toxic drugs to leak gas and eventually burn through the ozone layer. At the same time, the boy (Zhang Ning) who was resting at home due to his illness suddenly found that he could understand the language of his good friend, Big White Cat. The big white cat told him that this serious accident, if not stopped in time, the living things on the earth will eventually perish. However, adults are so busy running for money that they do not believe what boys and animals say.