It's winter in the Oregon wine country, and small-town lawyer Cal Claxton deserves a respite after his last grueling case. But just as the world learns about a threatening new virus variant, a woman named Willow Daniels shows up at his office, asking Cal to represent her in the settlement of her uncle's estate. His death was ruled a suicide, but Willow isn't buying it. Getting involved is against Cal's better judgment, but how can he resist this single mother who tows her young daughter in a trailer behind her bike, takes gorgeous photos of Portland's bridges, and serves delicious French cuisine from her Portland food cart?

Cal soon learns that the uncle, a brilliant scientist, recently came up with an innovative device to detect viruses. The expected payoff is huge, and the list of those who stand to gain from his death gets longer and longer. Cal finds himself immersed in one of the most complex and dangerous cases he's ever investigated.

When a key witness is brutally murdered, and the woman Cal loves falls ill, he realizes he's up against two killers --- a ruthless murderer and a deadly virus.