Vox Machina finds Whitestone's holy leader, Keeper Yennen, who tells them of a growing rebellion. The team realizes that to defeat the Briarwoods they will need the help of rebel leader, Archibald Desnay. But first they must stage a daring prison break and confront the Briarwoods’ sadistic jailer, Kerrion Stonefell.

As Vox Machina discovers more about a revenge pact Percy made years ago, Keyleth tries to magically connect with the Sun Tree. She senses its pain as well as a dark force deep below the city of Whitestone. Feeling underappreciated, Scanlan volunteers to infiltrate Duke Vedmire's mansion as a distraction while Vox Machina attempts to rescue Percy's sister Cassandra.

The Briarwoods' evil past connects with the present as Delilah reveals her pact with the Whispered One. In the bloody Whitestone streets, Vox Machina wages the fight of their lives against an undead horde. But just when all looks lost, the team gets help from an unexpected source.