After waking up on a peculiar planet, Mario finds a playful star like creature, named a Luma and he must play hide and seek with the Luma and his friends to gain information about where he is. After successfully capturing all Lumas, the first Luma leads Mario up to a podium, where a beautiful woman in blue robes stands waiting. The woman is named Rosalina and she moves around space by using her mobile Observatory. It was her who gave the name 'Luma', after finding the first Luma, named 'Luma'. According to her story, one day she finds Luma stranded on Earth; this is the first time for her meeting Luma. She says that the observatory after Bowser stole its Grand Stars, which give the observatory its power.