 During the course of the game, the Princess sends notes and special items to Mario and Luigi, as they restore the kings of each kingdom. When the brothers rescue the seventh king, the letter they receive reveals that Bowser has kidnapped Toadstool and is holding her captive in the castle of his own kingdom, Dark Land. The brothers travel through Dark Land, enter his castle, and defeat Bowser in a battle. The game ends with Toadstool being freed from the castle.
