The game follows the movie's plot, following Harry Potter as he tries to enlist Hogwarts students to his new secret society, Dumbledore's Army, in order to teach students Defence Against the Dark Arts. Being a mobile game, the story is mostly via dialogues and the occasional cutscene; each of the game's levels is preceded by a text-only introduction that sums up previous events. The players control Harry as he tries to sneak through the Hogwarts corridors, unseen by fellow students; from time to time, the stealth sequences are interrupted by duels (twitch action mini-games) and simple puzzles.