After escaping from the black dragon Umbrasyl, Vox Machina is split up. Half of the party find themselves lost in another dimension, the mysterious Fey Realm. They encounter strange dangers as they seek to recover the next Vestige of Divergence. Meanwhile, the other half of the party searches for a way to heal their cursed teammate.

In the Fey Realm, Vox Machina unexpectedly discovers the city of Syngorn and meets Vax and Vex's father. After the emotional encounter, Vox Machina journeys deeper into the Fey Realm, searching for the next Vestige of Divergence – the Fenthras Bow. To acquire it, they must confront an ancient and powerful archfey. Meanwhile back in Tal'dorei, Scanlan and Pike attempt to nurse Grog back to health.