When I stumbled upon the communion wafer bunker nearly two decades ago, my first impulse was to share the triumphant Nancy Drew moment with my dad, who spent his childhood in the very same church. I expected revelry, maybe even congratulations; instead he wondered aloud, “I wondered how long it’d take you to find that.” Just like those characters in Lady Bird, turns out I was far from the first to want to demystify the mystery behind the Holy Communion wafer.