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The quest is given by the Vault 76 overseer at her home, alongside the quest Strange Bedfellows. The first step is traveling to Foundation at Spruce Knob, and talking to Paige in the underground Founder's Hall. After warning him about the danger of the Scorched Plague, he is willing to believe them, but wants Aubrie Willem, the Foundation's co-founder and doctor, to confirm the necessity of inoculation against the plague.
Aubrie is found at a small camp northwest of Vault 96, but the camp has been overrun by Scorched. After disposing of them, the player character has to inspect the dead bodies (Luck 8+ allows one to search one of the bodies for clues; another can be searched with Perception 8+ to yield two stimpaks and a trail). After examining all four bodies, one finds a trail that leads north.
The trail of footsteps leads to a secluded cave. Aubrie is found inside. He's spooked and will at first accuse the player character of being with the scorched. He can be pacified with Charisma 4+. One can mention the plague and the inoculation against it. When Aubrie asks about the specifics of the plague, Intelligence 4+ allows for quickly summarizing the transmission method, incubation period, and the availability of an inoculation. Once Aubrie's convinced, the player character can return to Foundation and report to Paige that Aubrie backed them up and the inoculation is necessary, completing the quest.
Upon completing the quest, one can return to the secluded cave to find that Aubrie has committed suicide and left a note on the crate he's laying against.
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