In Inner Growth, The Queen of the underworld gave birth to a daughter and named her Thalna. You'll follow the protagonist Thalna throughout this game. She is the spoiled daughter of the Queen and spent most of her time in the underworld because of some things that forced her out of the human realm. Angels have left the world due to the negativity of humankind, which lets demons ruin everything. Your job is to team up with the people, and let's see what happens after you do.