Shining stardust falls on the Mushroom Kingdom once every hundred years. That time had come again…

“Dear Mario,
Would you like to share some cake while we watch the shooting stars? Meet me at the castle!
Peach”

Mario ran through the field with stars falling around him. Suddenly, he noticed a strange light in the grass. As he peered cautiously through the reeds, he saw a small, lost Luma. With the baby Luma tucked safely under his cap, Mario rushed on to the castle. But when he got there, something unexpected was waiting for him…