The battle at the LexCorp Black Bayou facility continues, with the heroes helping security forces as they repel Cult of Kobra terrorists. Gabe notes the arrival of Solomon Grundy, the raging behemoth picking up and tossing an assortment of vehicles in the parking lot. As he confronts the monster, Molly prepares a trap by opening a portal to an alternate, post-Kali Yuga reality. She then taunts the slow-witted villain into entering the portal, shutting it behind him and trapping a confused Grundy on the other side.

Inside the main processing tower, Gally and Decks defend their techno-magical "Temperance Engine" from the cult leader (Kobra) and his fanatical followers. Kobra manages to use a flash of light from his staff as a distraction as he sneaks into the upper levels of the tower, preparing a ritual spell intended to bring about the Age of Chaos. While the heroes quickly deal with Copperhead, another villain in the employ of the cult, Kobra enacts his magic circle and causes a potentially catastrophic instability in the central chamber of the tower.

Molly enters the astral plane through a backstage doorway to confront the spell in its spiritual form, allowing herself to be swallowed by its snake-like body in order to reach its vital inner working. When she figures out the formulae used in the ritual, she turns the spell in on itself and is then rescued by the astrally projecting Decks. Meanwhile, the rest of the group captures Kobra (teleported by Deck's Chariot tarot card) after Gabe bonks him on the head with a pipe. Gally and Dr. Nguyen successfully keep the tower from being overloaded, and the authorities and LexCorp security begin taking in the defeated would-be world destroyers. 

With the Kobra attack foiled, Decks and Gally activate their device, causing the biomass processor to radiate a wave of restorative, calming energy. The flash of white light encompasses the coastal region and removes physical corruption from St. Roch and its surrounding area. The natural balance along the Mississippi River and Gulf appears to be restored and the heroes find their home town to be at least physically cleaner than they remember. Molly then informs them that she has made an agreement with the ancient Choctaw shaman known as Nalusachito (or "Soul Eater") to meet him back at Thibault Manor. She hopes to use a agreed-upon game to get the evil wizard to give up his plans for the troubled city and leave forever. Detective Chimp and the Hawks wish the team the best of luck, knowing that its down to them to confront this dark influence. 

After driving into the starkly clean Old Town neighborhood of St. Roch, the heroes enter Thibault Manor to find Nalusachito awaiting them in a massive, emptied room. Gabe is confused at first as he turns out to be the same old man who had vexed him at his dying farm over the past several weeks. After introducing himself to the group, the Soul Eater gives the terms for the contest; he will pick a citizen of St. Roch who has been influenced both by himself and the heroes. A third party observer will watch scenes from this person's life over the past day (the final day of the St. Roch Festival) and judge whether or not the heroes' acts have transformed his existence for the better. If they find in the heroes' favor, Nalusachito will be bound by his oath to leave the city alone. If the Soul Eater wins, he can do as he wishes.

The magician proposes that the subject of the contest be SRPD Captain Norris Nunn, the corrupt head of the Major Crimes Unit. When asked to provide a reasonably objective judge, Molly proposes that Nalusachito summon John Constantine, a cynical British occultist. The sinister shaman agrees, bringing a confused and complaining Constantine into the chamber. After explanations are made, the investigator agrees to play judge for the game. The group then observes several scenes from Capt. Nunn's night, watching him deal with a hostage taking, some kids squatting at an abandoned construction site, Jackie Doucet, Saradel Hamburger, and a maddened Iray Hamilton. In each of the encounters, Constantine sees how the team's actions have bettered the community and improved the dirty cop's demeanor. While he is no saint, he has begun to truly serve St. Roch rather than simply his own purient interests. 

Constantine announces his judgement in favor of the heroes, and the enraged Nalusachito gets up to depart, vowing that it is "not the last you've heard of me". Before he can continue his threat, the front doors of the manor open and in flood a small army of stray dogs led by Rex the Wonder Dog and the Black Dog (the manifested city spirit of St. Roch). The dogs pounce on the screaming Soul Eater, tearing him to shreds and leaving no trace of his existence. 

This parasite on the soul of St. Roch defeated and their futures brighter than they have been in a while, the team basks in their victory, celebrates the end of the Festival, then turns their attention to rebuilding what has been lost.