Perhaps the best place in 1943 Hollywood to see the stars is the Hollywood Canteen, a club for servicemen staffed exclusively by those in show business. Murder mystery playwright Annie Laurence, new in town after a devastating breakup, definitely hopes to rub elbows with the right stars. Maybe then she can get her movie made. But Hollywood proves to be more than tinsel and glamour. When despised film critic Fiona Farris is found dead in the Canteen kitchen, Annie realizes that any one of the Canteen's luminous volunteers could be guilty of the crime. To catch the killer, Annie falls in with Fiona's friends, a bitter and cynical group --- each as uniquely unhappy in their life and career as Annie is in hers --- that call themselves the Ambassador's Club.

Lillian Kaufman hasn't heard from her twin sister since Eleanor left for a mysterious job at an Army base somewhere in Tennessee. When she learns, on an unexpected phone call, that Eleanor is missing, Lillian takes a train from New York down to Oak Ridge to clear up the matter. It turns out that the only way into Oak Ridge is to assume Eleanor's identity, which Lillian plans to do swiftly and perfectly. But Eleanor has vanished without a trace --- and she's not the only one. How do you find someone in a town so dangerous it doesn't officially exist, when technically you don't exist either? Lillian is thrust into the epicenter of the gravest scientific undertaking of all time, with no idea who she can trust. And the more she pretends to be Eleanor, the more she loses her grip on herself.