Enrique's first official field assignment leading a team of demonically possessed agents is investigating remains found in the New Orleans bayou that fit in a shoebox. Elkie insists they first get rid of Enrique's recent curse by visiting an old and dangerous adversary. The others hunt the city and swamps where Father Ebbs uncovers blasphemous truths with a new friend—truths that will tear the group apart and fill the bayou with blood.