Cast ye who is without sin! After discovering that demonic creatures exist, Danny Matthews, by chance or providence gains the power to fight demons and becomes Caster. Suri and Nina escape from the danger of the Leviathan only to face the armies of Heaven standing against them. Danny and Doctor Brimstone discover a secret stairway to Heaven in a desperate bid to rescue their friends. Now only the guardian of the heavenly gates stands in their way, the mighty arch demon Mammnon.