Hughes Starts Following the Shape Around the Secret
SPOILER!
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The investigation gets bigger than Ed and Al
The brothers leave Lab 5 knowing the Philosopher's Stone conspiracy reaches into military research. Hughes is one of the adults trying to understand how the scattered pieces fit together.
His investigation moves toward information dangerous enough that the people protecting the conspiracy cannot simply ignore him.
Why it matters
Lab 5 changes the scale of the mystery. The question is no longer who ran one illegal laboratory. It is how much of the State has been arranged so laboratories like it can exist.