During a thunderstorm, Connie discovers the twins have wandered off. Chet and Roman find them at the bottom of an old mine shaft, but the claustrophobic Roman is reluctant to descend into the tiny space. After some encouragement from Chet, Roman courageously climbs down into the mine, while Chet goes in search of a rope to pull them out. Upon realizing that the mine is stocked with old dynamite, Roman takes his daughters and climbs out of the shaft on his own.