Story Premise
The story is set a year after the defeat of the Fell Dragon Sombron. Peace has returned to Elyos. However, mysterious Corrupted Rifts begin to tear open across the continent, disgorging armies of Corrupted soldiers and phantom warriors from other eras.
Alear, the Divine Dragon, discovers that these rifts are born from lingering remnants of Sombron's power. To close them and save Elyos from being overrun, Alear must once again gather the Emblem Rings and unite the four kingdoms for an all-out war, facing both new threats and twisted echoes of their past battles.

Playable Roster
The roster focuses on the core cast of Fire Emblem: Engage, with a mix of unit types. Emblems themselves are not directly playable but are equipped for power-ups.
Base Game Roster
Lythos: Alear (M/F), Vander
Firene: Alfred, Céline, Chloé, Louis
Brodia: Diamant, Alcryst, Lapis, Citrinne
Elusia: Ivy, Hortensia, Kagetsu, Rosado
Solm: Timerra, Fogado, Merrin, Panette
The Four Hounds (Unlockable): Zephia, Griss, Marni, Mauvier
Special: Veyle

Potential DLC
Wave 1: The Fell Xenologue Pack: Adds Nel, Nil, Rafal, and Zelestia as playable characters, along with a new side-story campaign and History Mode maps based on the DLC's events.
Wave 2: Retainers of Firene & Brodia: Adds Boucheron, Etie, Jade, and Amber as playable characters.
Wave 3: Retainers of Elusia & Solm: Adds Zelkov, Bunet, Pandreo, and Saphir as playable characters.
Free Update: Sombron becomes playable as the ultimate unlockable character after completing all story content.