In an adventure which occurred before the start of the main story, Aaeowyn and Olash try to pick up a bit of extra cash for the party by taking on a minor errand from a local scientist named Revla Copperplate. With Cassian appearing to have found "other lodgings" for the night, and Yarfick passed out from the previous night's bender, the pair decide to pursue this presumably simple errand on their own.
They go out to a camp in the woods to retrieve a box from the scientist's assistant, Franklin, and bring it back to town. However when they arrive, they find webbing all over the camp, including Franklin himself cocooned in it. Upon freeing him, they are told that large spiders raided the camp and stole the box. Even as they remark on how odd this kind of behavior is for spiders, they go further into the woods to recover the box.
Soon Olash and Aaeowyn find the spiders and engage in combat. The battle is stopped (though not before one of the spiders is killed by Aaeowyn) by a sentient tree named Hintargararcararleaf, the Sown Seed, the Shielded Bow, and Keeper of the Grotto. Hintargararcararleaf, the Sown Seed, the Shielded Bow, and Keeper of the Grotto demands to know why the party are attacking the spiders, which he calls his charges. They explain about the box, and Hintargararcararleaf, the Sown Seed, the Shielded Bow, and Keeper of the Grotto reveals that the contents of the box were actually spider eggs, stolen by Franklin (who arrives in the grotto).
Franklin explains that the eggs were for experiments to test the effects of certain potions and tinctures on the embryonic state. Hintargararcararleaf, the Sown Seed, the Shielded Bow, and Keeper of the Grotto seems unimpressed by this explanation, but his intended justice is delayed when the stolen eggs hatch. A small group of spiders emerge from the eggs, grow swiftly, and appear to be made up partly of a kind of elemental fire. The spiders attack, causing Hintargararcararleaf, the Sown Seed, the Shielded Bow, and Keeper of the Grotto, Aaeowynn, and Olash to join forces to prevent the fire spiders from destroying the grotto.
Their combined forces are able to kill the fire spiders, largely aided by Aaeowyn's ability to use magic to dowse the flames and make it possible to attack them without being burned. Given that they aided in the defense of the grotto, Hintargararcararleaf, the Sown Seed, the Shielded Bow, and Keeper of the Grotto decides to let the three go. Even Franklin, despite the fact that he's a dick.
Aaeowyn and Olash take the box, now containing only the remnants of the eggs, and return it to Revla. Because the eggs had already hatched, the scientist refused to pay the fully agreed upon amount. The pair take what they can get, and Aaeowyn uses prestidigitation to make it look like Revla peed herself.