A woman and her young son are murdered in Montana's bucolic farming community of Gallatin Valley. The woman's husband is suspected of being the murderer but he commits suicide before anyone can find out for sure. Who really committed the murders - and why -remains a mystery until 30 years later when the family's surviving daughter (who wasn't home the night of the killings) returns to find out exactly what happened. Did a fight over water rights or an unrequited love affair have anything to do with the killings? The surviving daughter and a local retired attorney turned farmer, manage to stir up a hornet's nest on their way to unraveling this mystery.