In a green rice field, there live two happy little frogs. They start catching pests in the rice fields before dawn every day. They are busy all day long, and the rice seedlings like them very much. In the evening, they and their friends hold concerts in rice fields, rivers or ponds, competing to see who has a better voice, who has better lyrics, and who has better tunes. From time to time, we have to compare who has eliminated more pests today and live a fulfilling and happy life. But the seemingly peaceful life of the Frog Brothers will also encounter ups and downs...