Mikoto, the queen of Hoshido, survives an assassination attempt. Yet she does not escape unscathed. As Hoshido's ruler slowly dwindles away, she discovers that her shrinking size bears consequences for more than her alone..

When Oboro receives a small, useless needle from Hinata, she initially thinks it to be nothing but junk. Yet that same needle sets her off on an amazing adventure. Rubbing shoulders with a bizarre race of miniature creatures, Oboro must master the magical abilities of the needle, else be stranded in this alien world...

Defeated by Zephiel, Cecilia is imprisoned in the castle dungeons. Sharing her cell is the shaman Sophia, who so happens to know a spell that can solve all of Cecilia's problems. Her newfound freedom quickly proves to be a mixed blessing however, and the mage general finds herself contending with her own volatile size...

An unusual Mila statue causes Palla to take on an entirely new class, one with a small side effect. With the help of Palla's new powers, Celica leads her allies deeper into a secret, tiny dungeon in search of the strength she needs to fulfil her wishes. But something sinister is sealed deep inside...

No matter what she tries, Camilla simply can't stop fretting about Corrin. When she's at her wit's end, Selena presents her with a suspicious potion. Camilla is quick to drink it, unaware of its true purpose...

An attempt to rescue Setsuna causes Hinoka to lose most of her height. Shrunken down to a tiny size, the roles are reversed, with her retainers actually having to look after their puny princess for once. But will they be helpful? Or will her retainers prove to be the biggest hinderance to the miniaturized Hinoka?

After turning against both Hoshido and Nohr, Corrin and Azura journey towards a land beyond either. However, an ambush causes them to be transported to an entirely different realm. A world where Dragon Veins come with a strange side-effect...