How long could you live as a fish? Yushin, the president of the Saseong Group, is dumped into a lake and left for dead after being deceived by his boss. But underwater, Yushin hears a strange voice calling out to him. Do you want to begin a new life? When he awakens, he discovers that he is a slimy, scaly largemouth bass who must complete a variety of adventures that will grant him one wish in the end. Can Yushin be able to cross the ocean and discover a means to revert to being a human?