The game takes place in the late 1800s, 100 years before the events of the main Harry Potter series. Players assume the role of a young wizard or witch who attends Hogwarts School of Witchcraft and Wizardry, exploring the castle, learning magic, and uncovering a mysterious plot.
MultisekaiStudio, as a fan-made content creator, might have their own twists or additions to the game, but I'm assuming you're referring to the official game.
