Start of Elysium & Purgatory (Prequel)

The rulers of the underworld had a baby.
Krista and Hayden had lived in the underworld for centuries. All those myths about Persephone and Hades have come from them. They were the real Persephone and Hades.
It was impossible to have a child in the Underworld but somehow it happened; somehow Krista became pregnant.
After a lot of mood swings and grumpiness, Krista gave birth to an adorable baby boy that she called Alastor.
What she didn't know was that Alastor would be her downfall which would cause her husband's downfall; like a Trigger Effect.