Trust no one on a treasure hunt. Jess begins to wonder if this is true as she suspects someone close to her might've leaked an important clue to Billie, but she doesn't want to believe it. While Tasha uses her tech skills to ferret out the mole, Jess realizes the key to the next step in the treasure hunt is locked in the Rare Books Room at the Governor's mansion, leading Jess and her friends to plot a caper during the Governor's Ball, where Jess's trust in her friends will be tested.
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