2040 Nanjing is full of green and has become the "big eyes of animals" heaven. Ban Xia insists on using radio stations to contact the world every day. In 2019, high school student Bai Yang became a radio enthusiast under his father's influence. When he made independent communication for the first time, he accidentally receives a signal from Ban Xia in 2040. The two embark on a communication journey across time and space.

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