The hub of world economy, Sam City... Found here is the famous economics institute, the MBA School. It's well known for training outstanding economics specialists. 4 kids enter the school this year. Summer, a mischievous economics genius. Yoony, the proud but warm hearted daughter-of-a-millionaire. Luey, the soft-hearted artist. And Toto, the smart and haughty bully. Our four heroes team up and use their economic knowledges to fight against the Akeron Enterprise, a menacing threat monopolizing Sam City's economy.