While traveling to find the next Vestige of Divergence, Vox Machina passes by Pyrah, home to the Fire Ashari people. Discovering that the village is in distress, Vox Machina must help them, battling fire creatures that are spilling out into the world through a portal to another dimension. As they try to close the portal, Keyleth learns more about the power that lies within her.

After a devastating loss, Vox Machina must take the fight to Thordak with one less memeber. They travel across Exandria recruiting allies to face down the Cinder King in his lair. Will the gathered might of the world be enough? Or will Thordak turn Tal'Dorei to ash?