Maddie and Jackie stumble upon traces of bootlegging, discovering a consistent flow of substantial monthly income. To their surprise, Grandma's meticulous bookkeeping reveals numerous references to Hopeberry and barrels, leaving them puzzled about the nature of these operations. The perplexing question arises: How did the family fall into dire financial straits despite the steady influx of money? Meanwhile, Holden captures photographic evidence of these incriminating documents. Amidst their investigation, Maddie uncovers a hidden trapdoor, frustratingly resistant to any ordinary key's attempts to unlock its secrets.