Mario and Luigi visit Princess Peach’s Castle. As usual, they enjoy chatting with Princess Peach about their adventures. As Princess Peach waves farewell, Mario and Luigi use tail transformations to snag a bunch of Coins from the sky. No sooner do they land for a break than a black shadow approaches overhead. They hear a loud boom as Bowser’s minions appear in an aircraft and slam to the ground right on top of them. In surprise, they stare as Princess Peach appears and calls for help. She’s been kidnapped again! The heroes set out in pursuit and a new adventure begins!