In the fantasy setting of the Mushroom Kingdom, a tribe of turtle-like creatures known as Koopa Troopas invade the kingdom and use the magic of their king, Bowser, to transform its inhabitants, known as the Mushroom People, into inanimate objects such as bricks, rocks, and horsehair plants. Bowser and his army also kidnap Princess Toadstool, the princess of the Mushroom Kingdom and the only one with the ability to reverse Bowser's spell. After hearing the news, Mario decides to save the princess and free the kingdom from Bowser.
