Kujuta, last of the Samaki tribe, joins with a young gunslinger named Salsa to fight a horde of seafaring raiders, but ends up coming face to face with his inner demons.
During the thousandth annual Summer Moon Celebration, the Mare in the Sun returns in an attempt to overthrow Equestria and return balance to day and night, and it's up to the Queen's apprentice Dark Tome to stop her.