This isn't the full story to the it just tell the main plot for the game

Story

One day when Princess Toadstool was picking flowers. For the millionth time Bowser came and took the princess. Once again Mario came to the rescue. He went to Bowser's Keep. Mario and Bowser fought on a chandelier. When Mario won again Bowser's Keep shook and Mario flew out the top of Bowser's Keep. When Mario returned to Bowser's Keep A big sword was on the top of it saying Smithy will rule this world someday and even worse the bridge to Bowser's Keep was destroyed. Mario has a long journey ahead of himself. He meets strange and funny characters on his way and Mario just won't stop searching until he finds a way in Bowser's Keep and teaches Smithy a lessen.