The story takes place on an island in the Atlantic Ocean called Dayan Town. The local people make a living by producing sardines. Suddenly one day, the whole world suddenly found that sardines were super disgusting. Since then, sardines have basically not been sold, and the only large sardine canning factory in Flint's hometown that can make money has also closed down, which has had a great impact on the economy of his hometown and people's normal life. Flint Lockwood (voiced by Bill Haider) is a scientist who likes to invent and toss all kinds of strange things since he was a child. He proved this problem in the most difficult time of everyone's life and put forward a solution. However, his research method is different from other scientists. He thinks that there is the most effective way to solve the problem of eating: to rebuild food molecules by changing the structure of water molecules. At the beginning of the experiment, the wires at home were short-circuited, and his father began to persuade him to stop inventing and do something serious, such as helping his father's sardine shop. There is no choice but to go to Flint.