Virgil Flowers knows the town of Trippton, Minnesota, a little too well. A few years back, he investigated the corrupt --- and, as it turned out, homicidal --- local school board, and now the town is back in view with more alarming news: A woman has been found dead, frozen in a block of ice. There’s a possibility that it might be connected to a high school class of 20 years ago that has a mid-winter reunion coming up, so Virgil begins to dig into 20 years’ worth of traumas, feuds and bad blood. In the process, one thing becomes increasingly clear to him. It’s true what they say: High school is murder.