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.