The Pearl Diver (Rei Shimura Series #7) in Bloomington, MN

The seventh book in Sujata Massey's Agatha and Macavity Award–winning mystery series is a witty, suspenseful story that takes its young sleuth into the Washington DC restaurant world.
A dazzling engagement ring and the promise of a fresh start bring antiques dealer and sometime sleuth Rei Shimura to Washington, DC. But just as she's starting to settle down –catching up with a long–lost cousin and undertaking a lucrative commission furnishing a trendy Japanese restaurant nearby – things begin to go haywire. First, her cousin vanishes from the restaurant's opening–night party, and then Rei is drafted to help find a Japanese war bride who disappeared 30 years earlier.
The search for both missing women becomes suspiciously linked, and along the way, Rei faces truths about herself that may change her destiny – if she lives long enough.