In the midst of a battle against a new, mysterious alchemist villain in Amestris, Edward Elric is unexpectedly transported to the magical land of Equestria, where ponies wield powers unlike any he’s ever seen. Stuck in the body of a young colt, complete with a metal foreleg, back leg, and horn, Edward finds himself in the care of Princess Twilight Sparkle, who quickly becomes his guide and protector in this bizarre new world.

Twilight, the Princess of Friendship, is determined to help Edward adjust to pony life and figure out how to get him back to Amestris. But as the days go on, things get more complicated—and more hilarious—than either of them expected. When a simple slip of the tongue leads Edward to accidentally call Twilight “Mom,” the entire town of Ponyville (and beyond) suddenly believes that Twilight has adopted the “brave young colt” as her own. With her reputation on the line and Edward trying to dodge the affection of his newfound admirers, the duo faces a whirlwind of confusion, chaos, and—surprisingly—family bonding.

Edward soon discovers that being seen as Twilight’s “son” comes with unexpected perks. Ponies treat him like royalty, and while he initially resists the idea, the temptation of free food, gifts, and respect is hard to pass up. But things take a strange turn when Apple Bloom, Applejack’s little sister, develops a crush on him, turning his farm visit into a frantic chase that leads to Edward accidentally teleporting right onto Twilight’s back—just as she’s saying goodbye to her brother, Shining Armor. Edward calling Twilight “Mom” in front of her brother only adds to the confusion, sending Shining Armor into a fit of disbelief.

As Edward tries to adjust to his new life as Twilight’s “foal,” he slowly begins to unlock his own magic, all while dealing with the chaos of Ponyville, Spike’s jealousy at not being able to call Twilight “Mom,” and the well-meaning interference of Twilight’s friends—who even throw an unexpected baby shower for Twilight’s “new son.” Along the way, Edward faces awkward encounters, like getting stuck in apple baskets, running from lovestruck fillies, and accidentally teleporting at the worst possible moments. But through it all, he and Twilight form an unlikely bond, one that feels strangely like family.

Meanwhile, back in Amestris, Edward’s real body lies comatose, with Alphonse and Roy Mustang desperately searching for a way to wake him. Unbeknownst to Edward, Princess Luna has been dream-walking across dimensions, keeping an eye on Amestris and the struggles of those he left behind. Can Edward master his magic, defeat the villain that sent him to Equestria, and find a way home? And when he does, will he be able to leave behind the new friendships—and family—he’s found in Equestria?