Little Girl Finds A Secret Room In Her House That Leads Into An Even Wilder Surprise

The hiding place of the treasure must’ve been concealed by whoever hid it there, as there was now a wall separating it from the little girl’s bedroom. Did she hit a dead end? Her father knocked on the wall and realized that it sounded hollow. By knocking around, he pinpointed the exact location of the hidden treasure. What was back there?