Controlled by a “Balance”, this is a city where everyone needs to pay for everything. Sister and Brother, who had to work all day long for a living, always hit a snag in their daily life. A blessing in disguise, Sister luckily entered a grand competition with a chance to get rich in one day. On the other hand, Brother discovered the secret operation of the competition and the city. As a pair of klutz siblings, could they win the competition? And could they change this money-driven city?