Beer and polka music reign supreme at Octoberfest, Battle Lake's premier fall festival. To kick off the celebrations, the town hosts a public debate between congressional candidates Arnold Swydecker and the slippery incumbent, Sarah Glokkman. But the festive mood sours as soon as a well-known Glokkman-bashing blogger is found dead. When Mira's best friend's fiance becomes a top suspect, she wades through mudslinging and murderous threats to find the political party crasher.