Bowser has turned the Mushroom Kingdom into a hotel resort for the use of himself and his children. The land is renamed "Klub Koopa Resort" because of this. Each hotel in the area is protected by one of the Koopalings and their henchmen. The hotels represent different building types with many different locations, including a tree, a mine and a cloud. When Mario and Luigi are invited to a picnic by Princess Toadstool, Mario and Luigi enter the Mushroom Kingdom. At the entrance, however, they find a message from Bowser. They find out that Bowser has taken control over the kingdom and established seven hotels there, at one of which Princess Toadstool is being held as a "permanent guest". As they visit the first six hotels, Mario and Luigi find the Princess many times, but on every occasion she disappears out of their sight, ending up in another hotel. They eventually enter another land where Bowser himself lives. With the hotel's owner killed, the brothers run away from the building with Princess Toadstool before it falls apart. The Princess, now able to rule her kingdom in peace, thanks the Mario brothers for saving her, giving them both a kiss.