The Church of the Holy Sun has allied itself with the Great Preacher, and Captain Obi of the 8th Brigade has been imprisoned. In order to save their captain, Shinra and his comrades, pursued by the empire, will enter the great prison of Fuchû with the help of the mysterious Joker. But Captain Barns of the 1st Brigade and the Exterminators, experts in combat against the holders of powers, wait for them on firm foot.