There’s a chill in the Wisconsin air, and it's a shot in the arm – a triple espresso shot – to Uncommon Grounds, the Brookhills coffeehouse owned by Maggy Thorsen and real estate maven Sarah Kingston. Their new autumn drink is a huge success. But two estate agents have died lately, and Sarah herself is under investigation for irregularities at her job. Then a stench begins to percolate through the coffeehouse, and soon it’s clear that corpses – like other bad things – do indeed come in threes . . .