This story is a sequel to Fallout: Equestria: Before The Bombs Fell

When Knick-Knack, a scavenger and adventurer, finds a memory orb revealing a secret, pre-war stronghold, untouched since the days of the royal sisters, but when he realises that the defences of the fortress are too much for him to handle, he relies on the aide of a cornocopia of mercenaries, thieves, assassins and psyscopaths.