Picking up from the aftermath of Session Seventeen, the party stands before the final chamber of the Petrolina cemetery crypt. Khalid’s body remains secured within Mickle Cobblelob’s Bag of Holding. As the massive marble doors groan open, the party is confronted by Remorso, a demon of the Legion and the source of the necrotic doom infesting the site. The demon is immediately shrouded in a ten-foot aura of magical darkness that imposes blindness on any who enter. Grundel flies into a barbarian rage and charges into the gloom with his “Thoughts” and “Prayers” brass knuckles, though his strikes initially find only empty air as the demon laughs from the shadows.

As combat intensifies, a stranger named Amnon—a tiefling bounty hunter and sorcerer—approaches from the corridor. Amnon, also hired by Marshal Yasmin Santiago to eliminate the demonic threat, joins forces with the party. He demonstrates formidable arcane power, casting Blink to slip into the Ethereal Plane and is able to summon a spectral shadow dog to harry the demon. Meanwhile, Nebish discovers that the magic blade he recovered earlier in the crypt begins humming and vibrating, telepathically cursing at him in Abyssal as it seeks to be drawn into the fray.

The battle reveals a horrific mechanic: whenever Remorso is wounded, pulses of wicked energy fly from his core to reanimate corpses in the adjacent foyer, creating a self-sustaining cycle of undead reinforcements. Bludarious de'Tempoon (Blu) identifies the tactical threat and rushes to a holy water fountain in the previous room. He spends a frantic minute dipping his bullets into the blessed water to craft makeshift holy rounds. These bullets prove decisive, cutting through the demon's darkness barrier and dealing permanent, non-regenerative damage that forces the fiend to howl in pain.

Mickle utilizes his homunculus, Lofta, to deliver a R.I.P. Bomb directly onto the demon, dealing massive shrapnel damage. Nebish and Grundel coordinate their strikes, with Grundel using a radiant blow from his “Prayers” knuckle to finally drop the demon’s shield. For the first time, the demon's physical form begins to crumble into what appears to be smoldering black cottage cheese. Amnon concludes the engagement by unleashing a Chaos Bolt that washes over the last lurching zombie, melting it into a smoking pile of bone with fluorescent green acid. With its hosts destroyed and its physical form reduced to a black ooze under a dousing of holy water, Remorso is banished from the Material Plane.

Following the battle, the party thoroughly scavenges the crypt’s burial urns and hidden alcoves, recovering a massive haul of treasures: * A Wizard's Spellbook containing five pages of scrawled magic. * A mithril-headed branding iron and an electrum house medallion bearing the sigil of the local Lanish farming family. * Four pairs of fairy wings, a gold baby rattle, and a bandolier of silver flasks containing brandy, acid, and gold dust. * A silver brooch depicting a mage’s tower, an abacus, and a set of silver shuriken. The party pays their final respects to Khalid. Eschewing a traditional return to the city, they place his body in a grand, unused sarcophagus within the crypt, sealing it as a permanent monument to their fallen comrade.

The party returns to the capital at high noon, finding the city bustling with activity. They present the “chunky” remains of the demon to Marshal Yasmin Santiago at the Magistrate. Though she is appalled by the consistency of the evidence, she honors their contract, providing a 400 gold piece bounty. Amnon officially accepts an invitation to join the “band of degenerates” aboard the Sloop Dogg. Bludarious attempts to persuade the Marshal to restore his name to the city's monument of heroes, but his drunken state leads to a stern scowl and a refusal of further city resources.

Returning to the docks, the party finds Ormus and Gil have made the Sloop Dogg functional, though she remains visually battered and covered in barnacles. Lofta attempts to wash her wig in the seawater, inadvertently making it filthier. After a round of stories and sad songs honoring Khalid's memory, the ship weighs anchor and rises from Petrolina. The session ends with the Sloop Dogg sailing east toward Manticore to reunite with Captain Barnaby Harrier and the Wind's Revenge.