The Ballad of Sweet Strings/Lost Popcorn Cavern The Ballad of Sweet Strings: A horse named Johnny Strum begins using his voice to entrance the citizens of Nice and Friendly Corners to take their valuables and steals Sheriff Callie's guitar, Sweet String. Callie must stop him or risk failing under his spell too. Lost Popcorn Cavern: The Milk Bandit tricks the townsfolk into digging a hole into Farmer Stinky's cavern so he can steal all the milk.