The Conclave have come to Marais, to destroy Swamp Thing once and for all.
Abby goes back to the CDC, where new trouble arises. Back in Marais, Avery meets Swamp Thing.
Lucilia settles the score with Avery. In the swamp, Abby and Alec run into danger.
Swampy meets Phantom Stranger. Abby has to try and help Maria.