Sandy has a problem—aside from the cancer. No one on campus believes he saw the ghost building. And why would they? It's a stupid legend—no one really believes the Old Admin building vanished in the 70s—and what Sandy saw was right after he restarted chemo. Clearly he was hallucinating. That would explain it. What it doesn't explain is the postcard Sandy found in his dorm room the night the building appeared—or why the girl on the postcard appears to be the barista down at the Hub. You know, the girl he's in love with. Turns out she's a hopjockey—a cross-world troublemaker—and she's been looking for him. Or rather, she's been looking for who she thinks he is. She's mistaken him for Garrett—Sandy's genius roommate, likely this generation's Einstein—and needs his help reading a map beyond all comprehension. Weighing his heart against the truth, and not wanting to miss what may be his only real chance for adventure, Sandy does what anyone might have done in that situation: he lies. And as a result, triggers a series of events that will destroy the campus (and the rest of the universe).