The game takes place in the fictional world of Fódlan, where the land is divided into three main nations: the Adrestian Empire, the Holy Kingdom of Faerghus, and the Leicester Alliance. You play as Byleth, a professor at the Officers' Academy at Garreg Mach Monastery, which is a neutral institution that serves as a hub for the three nations.
The story follows Byleth and their students as they become embroiled in a conflict between the three nations, which is sparked by a mysterious force known as the "Crest" system. The Crests are magical symbols that grant special powers to those who possess them, and they play a central role in the game's story and gameplay.
The game is available on the Nintendo Switch eShop in NSP (Nintendo Switch Package) format. The NSP format allows for easy installation and updating of the game.