In a small village in southern Finland, middle-aged sisters Taina and Pirkko have promised to spend several weeks brewing 100 liters of their famous strong craft beer, Sahti, for a family wedding. But the beer turns out so good that they drink it all themselves. As they struggle with a massive hangover, they have a series of hilarious misadventures that lead them to race against time to brew more beer, save the wedding, and regain their reputation as the best brewers in the village.