The team reunites! They meet at Dergenbern's Ber 'n' Gerll and discuss their adventures. They notice the restaurant is noticeably empty, and Dergenbern informs them that something called the "Arcane Flu" – an affliction that causes wild magical effects when the sick sneeze or cough – has been going around Reykjaven. Serene and Dr. Holly have been working together to keep the infection quarantined as it is not lethal generally but highly contagious. Dr. Holly enters the bar in quite a fuss asking if Dergenbern has any more moss tea available for the sick – he provides the tea, and Dr. Holly notices the group.
She tells them that Serene instructed her to send them to her immediately and provides face masks to help keep them safe from the disease. She takes them to the quarantine zone and find a much nicer Serene than they remember. She tells Dr. Holly to hold down the zone while she attends to this new task and goes with the group. She quickly drops the "kind old lady" facade and takes them to her Tardis hut.
They enter the hut, and Serene instructs them to prepare for the ritual asking Marlin to look at the book she gave him. They set up the ritual, and Nydry fetches her sister as she has also been infected. Serene informs them that they'll need to take a break after cleansing the first subject. Nydry sends her sister back to the tavern until they finish.
The ritual begins and the group cleanses Orsik without issue! The team then cleanses the Amulet of Dark Summoning without issue as well. As Serene sits down to recuperate, she feels something strange. Her dimension has been hijacked!
The God of Darkness and Poison, Zehir, strolls into the hut and freezes Serene with dark magic. He offers the group one of their lives in exchange for Orsik's soul and the amulet. He reveals that he could steal the soul, but that stolen souls do not work as well as souls given freely. Grog quietly tells Orsik to cut his own throat to avoid being used as a pawn in Zehir's game if it comes down to it. Orsik agrees, knowing what needs to be done. He also reveals that Athalas is … HIS DAUGHER :O!
The team (obviously) disagrees to his teams, and he fades from the cabin as Imps begin to flood into the cabin. Orisk cuts his own throat and begins to bleed out. Serene breaks her bonds and begins taking back her dimension. The team protects her while she casts, and she stabilizes her dimension. Grog stabilizes Orsik. Serene leaves to fight Zehir face-to-face. The hut collapses and the group finds itself in a crypt filled with the floating bones and a single black diamond.
Mizuki, landing deftly on her feet, sees that Orsik is being pulled into the ground by the same dark tentacles that bound Serene earlier. The team jumps into action to save Orsik, but the tentacles are too strong for the group to fight against, and Grog makes a difficult decision – his magical blade attacks Orsik, and he snaps his neck to prevent his soul from being used for nefarious purposes.
They grab the dark gem, not having time to mourn the loss of their friend as the crypt closes in around them, and the world swirls around them dropping them into a darkned corridor with high hedge mazes on either side. The roots begin to grab at their feet, and Grog and Mizuki are both grappled by the roots. Robert Pattinson comes in to save the day using her deft acrobatics skills distracting the magical plants while the others pull their trapped friends free. There is another black diamond at the end of the corridor – the team runs to it and grabs it.
They are transported to a formal masquerade dinner party, and Nydry notices another black diamond on the table at the front of the party. She stealthily steals the diamond from the table from under the nose of the Monarch, and the team is then transported to a floating rock, surrounded by a great arcane abyss.
In front of them, a shadowy, four-armed figure turns around. The gaseous, incorporeal form of Athalas stands in front them. Combat begins!
The group comes out victorious, but Marlin is downed by Athalas' unrelenting assault. The darkness summoned by Athalas obscures the party members, but the defeat Athalas despite taking losses. The portal and island begin to collapse, but the team jumps through in time and find themselves in the middle of a quiet and peaceful Reykjaven. They had stopped Athalas from rising for good and foiled Zehir's plan… this time.