Baba goes into Grav and tracks a crate of forms from the customs office to a large ancient step-pyramid sort of structure outside of town, surrounded by smaller modern buildings. It's only lightly guarded, and the team is soon inside the temple, which seems to have once been some sort of evil temple but now is filled with crates of forms (presumably because the huge heap of stone keeps temperatures and humidity relatively stable inside). Ivar remembers an old story about Karl the warrior and his journey with some companions to an evil temple hundreds of years ago, which they cleaned out, and is very wary of the possibility for traps still in existence.
But in the easily accessible regions, there are no traps - just a lot of helpful signs indicating which forms go where in the maze of passages under the temple. Boxes are stacked in front of nasty frescoes and disturbing statuary, in ex-dungeons and on top of disused altars. Section Unicorn starts with the customs forms, and finds the one tracking the entry of the wine into the country. Then they go to the palace records and find the wine receipt and the poisoning form filed when it turned the King's cup black. Then it gets remanded to the Wine Department by order of (smudge) on a hand-written note, and they lose the trail of forms.
So they go back upstairs into the room set off as the "Reconciliation Office" and find the big manual of how to label forms when they get smudged, and then fine the Wine Department's numbers. Back into the depths they go, and find a form describing an "inferior Pennisian wine" transferred to the department at the right time, and a further form remanding it for "personal use". The fate of the wine is now clear.
During this time, Sasha has located a secret door, and cannot be dissuaded from exploring, so they head into the secret halls that are not yet filled with forms. They pass through the screaming gallery mentioned in Ivar's stories (stopping their ears with wax) and find a lot of evidence that a clever looter has been through - for example the jeweled constellations in one room have had their jewels removed. They finally come to a huge altar room deep under the ground, where a voice says from behind the massive black altar, in ancient Duman:
"Who the fuck is that?"
Nervously scouting, they find an incredibly emaciated body in tattered robes with a holy symbol around his neck. He claims to be the high priest of Drax, restored by the god's power after adventurers came and wrecked the big ceremony that was to incarnate him. Only Drax hasn't restored him enough to actually move, and the god doesn't listen any more... the priest is desperate to do something, anything, other than stare at the back of the altar. Ivar chops his head off, but that doesn't actually kill him, and eventually they decide with many misgivings to take the head rather than let the Gravlans find it. It's so starved for novelty that it's happy to be in a dark burlap sack.
A couple days later finds Baba in a fancy uniform at the Wine Department, pretending to be an Inspector General. She browbeats the workers there with her knowledge of the illicit wine transfer, and cracks them like walnuts. They're very afraid of being put away for corruption. It turns out that the wine is still mostly there, except for a celebratory bottle which was drunk at a party. Baba gets the list of people who had some, and takes the wine - or rather, is bribed with it.
The team decides that five new half-elves in the wine department do not need to be immediately assassinated, and sets off on horseback back to the Empire with their wine, a long journey, but a safe one.