From publisher blurb: Uma cidade cervejeira está sofrendo com a contaminação de seu tão estimado produto. Todos desconfiam que o problema seja a água utilizada, será verdade? A city is famous for its beer production. This is due to the huge lake of crystalline waters within its borders, using this natural resource in all processes, from the agriculture of the ingredients to the distillery. However, recently, the beer that met the various quality standards has a bad taste and is even contaminated, causing discomfort and making those who consume it sick.. Producers believe that the lake water is responsible, so they are looking for people capable of solving the problem that affects the local economy.