this is a map texture pack for Majora's Craft, it might break the game.
Story of Majora's Mask (copied from Zelda dungeon wiki):



The game starts with Link, now the Hero of Time from Ocarina of Time, looking for Navi in the Lost Woods. Two fairies, Tatl and Tael, startle Epona and Link is knocked out after falling off. A Skull Kid wearing a mysterious mask appears and steals Epona and the Ocarina of Time then rides into the woods. Link then follows Skull Kid into a mysterious tree. Link rushes into the tree only to find out that there was a pit, which he fell into. He then lands in a dark room, lit up only by torches and an eerie light emitted by the ceiling.

The Skull Kid turns Link into a Deku Scrub and leaves but accidentally leaves Tatl behind. Deku Link and Tatl follow them into Clock Tower. They meet the Happy Mask Salesman, who tells them that if they can get Majora's Mask and the Ocarina of Time back in three days, he can turn Link back into a Hylian. Link learns the Skull Kid has caused mischief across the new world he entered (Called Termina) and that he is trying to make the Moon to fall and destroy the world at the end of the third day.

Link gets the Ocarina of Time back and uses the Song of Time to transport him and Tatl back to the dawn of the first day. The Happy Mask Salesman turns Link back to a Hylian, leaving a mask behind to let him turn back to the Deku Scrub whenever he wants. Link then must awaken the four giants to prevent the Moon from falling and repeat the three days over and over until he succeeds. After saving the Deku Princess and removing the poison from the Southern Swamp, bringing the Snowhead region back to spring, saving the Zora eggs and clearing the fog from Great Bay, and bringing peace to souls in Ikana Canyon, the giants that Link awakened stop the Moon from crashing into Termina, but it is revealed that Majora's Mask had possessed Skull Kid and it then gives more power to the moon. Link goes to the moon where he defeats Majora's Mask with the help of the Fierce Deity's Mask if he chooses to get it. Link then returns to Hyrule and continues his search for Navi.