The famous Mario Brothers return in this sequel to the humorous Superstar Saga. In this adventure Princess Peach takes a trip in a time machine but when it returns there's only a monster inside! The heroic brothers travel back in time only to discover that evil alien life forms known as the Shroobs have taken over the Mushroom Kingdom and no-one is safe! They soon meet up with their younger selves and set out to stop the alien menace not to mention rescue the Princess!