<p>This series depicts the exploits of Ukai Zero, a brilliant boy who takes on the deadly gambles of the "test to become king." After creating a "Robin Hood rebellion" to help victims of bank transfer scams, Zero and his friends are accepted by Japan's richest man, Zaizen Muryou, to participate in the test to become king. But what awaits Zero is the ultimate gambling game where death is always around the corner!</p>