Rosalina's Storybook
A young Rosalina finds Luma in a space ship that resembles the Starshroom. Rosalina waits with Luma for Luma's mother who was apparently coming for him on a comet. Rosalina gets tired of waiting so the pair fix up the spaceship and set off. Together, they collect star bits to sustain themselves, and along their journey, they come across a comet. Luma gets excited and they land on the comet. Luma's mother was nowhere to be seen however, they discover star bits and supplies from which they can build a home on the comet. One night, Rosalina has a dream about her mother leaving her, promising to watch over her as the sun, moon, and stars do. She awakes crying over the grief of missing her mother, and Luma joins in. Eventually, they complete their home on the comet, though they acknowledge that it is quite large for just the two of them. One day, an apricot-coloured planet appeared from which another luma of the same colour came. Both lumas began excitedly shouting "My mama! My mama!", while dozens more lumas came from the planet. They all shouted "My mama! My mama!" as they circled around Rosalina who becomes the adoptive mother of the lumas. Many days pass, and she finds herself reminiscing about her home planet. She recounts the stories about how she would stargaze with her father on a hill, and sled down the hill in the winter with her brother. Upon recounting stories of her mother, she once again breaks down, homesick and distraught. Rosalina admits that her mother isn't watching over her from the stars, but rather that she is sleeping under the tree on the hill, revealing that she passed away and is buried there. After several days of crying, the first Luma decides to thank Rosalina for her love and care by transforming into a comet and helping propel their home back to Rosalina's home planet. Realizing that she herself must now take on the role of mother to all the Lumas on the comet, she rises into the role and cares for them all as a family, reminiscing about how one day each of them will grow up and move on to their own destinies and how she would smile each time because; "-that's what makes a mother happiest." Still missing her home planet, Rosalina resolves to visit the planet every century on the comet, allowing her to sleep in her favourite spot under the tree.
The Game Proper
Every hundred years, on the eve of the Star Festival, a comet passes over the Mushroom Kingdom and causes magical stars and stardust to fall to the planet below. Peach invites Mario to her castle to join in the festivities and receive a special gift. As Mario arrives in the Castle Gardens, Bowser suddenly attacks the Toads with his airships and encases them in crystals. He "invites" Peach to the creation of his brand new galaxy and lifts the castle off the ground with a UFO to carry it to the center of the universe. Before Mario can reach Peach, Kamek casts a spell at him, sending him into space. An apricot-colored Luma, whom Peach was carrying before her abduction, flees to look for Mario before Kamek warps the castle away with another spell.Mario is awoken by the apricot-colored Luma on a small grassy planet. Here, he meets other Lumas and Rosalina, a mysterious woman who acts as the protector of the galaxies and the mother of the Lumas. She tells Mario that her ship, the Comet Observatory, had its Power Stars stolen by Bowser. Without them, the Comet Observatory is unable to move through space. Rosalina asks him to reclaim her Power Stars. In exchange, she offers to help rescue Peach and defeat Bowser. Rosalina gives him the apricot-colored Luma to help him on his quest. He grants Mario the ability to spin and travel through space. Together, they travel to various galaxies in opened domes to obtain Power Stars. Once a mission is completed in one galaxy, Mario collects a Power Star and unlocks the next mission. Most domes contain five galaxies. Once Mario has collected enough Power Stars, the next galaxy in the current dome is an enemy base where either Bowser or Bowser Jr. would be using the power of one of the Grand Stars, large varieties of Power Stars. Rescuing the Grand Star unlocks the next dome. When enough Power Stars are collected, the Comet Observatory takes Mario to the center of the universe.Once there, Mario defeats Bowser in his brand new galaxy, retrieves the last Grand Star, and rescues Peach. Just then, a large sun in Bowser's near-complete galaxy undergoes a supernova and becomes a supermassive black hole which begins pulling in everything. The Lumas from the Comet Observatory, including the apricot-colored Luma, throw themselves into the black hole in order to neutralize it, and it soon evaporates in a massive explosion. Mario appears in front of Rosalina, who saves him from the cataclysm and tells him that this is not the end, but a new beginning for the universe, which repeats its cycle indefinitely, each time a little differently.Mario later awakens in the Mushroom Kingdom near Peach's Castle. He sees characters and enemies he met throughout his adventure celebrating together. Bowser and Peach lie next to him and begin to stir. When he looks into the air, he notices a newborn galaxy as Rosalina's words echo in his mind, and exclaims, "Welcome! Welcome new galaxy!" The camera pans out into space, revealing the reconstructed universe. After 120 Power Stars have been collected, a special cutscene plays after the staff roll: Rosalina thanks the player and says, "I will watch over you from beyond the stars." before flying off with the Comet Observatory. Alone in the rubble left by the supermassive black hole, an apricot-colored Luma appears behind a decrepit starship. This alludes to the idea of how the universe repeats itself. The events of the past will carry out anew, with the lost apricot Luma searching for its mother.
