I am Setsuna [Online Game Code]

I AM SETSUNA introduces the authentic JRPG style of yesteryear to Steam! Journey with Setsuna as she prepares to make the ultimate sacrifice and save the people of her land. A powerfully nostalgic experience, blending a classic style of story-telling, battle system and gameplay.

The Island had a custom.
To maintain peace, once a decade, a sacrifice was offered to a fiend on the island.

However, one year, the fiend grew violent before the next sacrifice was due.Those living on the island were afraid and tried to calm the fiend by offering a sacrifice; Setsuna, chosen because of her powers of enchantment.Setsuna must leave with her guards for the farthest land, where the ceremony of sacrifice will be held.