Fifteen-year-old Morgan has a secret: She can't wait to escape the perfect little island where she lives. She's desperate to finish high school and escape her sad divorced mom, her volatile little brother, and worst of all, her great group of friends...who don't understand Morgan at all. Because really, Morgan's biggest secret is that she has a lot of secrets, including the one about wanting to kiss another girl. Then one night, Morgan is saved from drowning by a mysterious girl named Keltie. The two become friends, and suddenly life on the island doesn't seem so stifling anymore.

Ophelia Harrison used to live in a small house in the Georgia countryside. But that was before the night in November 1922, and the cruel act that took her home and her father from her. Which was the same night that Ophie learned she can see ghosts. Now Ophie and her mother are living in Pittsburgh with relatives they barely know. In the hopes of earning enough money to get their own place, Mama has gotten Ophie a job as a maid in the same old manor house where she works.

As World War II comes to a close, the United States and the Soviet Union emerge as the two greatest world powers on extreme opposites of the political spectrum. After the United States showed its hand with the atomic bomb in Hiroshima, the Soviets refuse to be left behind. With communism sweeping the globe, the two nations begin a neck-and-neck competition to build even more destructive bombs and conquer the Space Race. In their battle for dominance, spy planes fly above, armed submarines swim deep below, and undercover agents meet in the dead of night.

Olivia Prior has grown up in Merilance School for Girls, and all she has of her past is her mother’s journal—which seems to unravel into madness. Then, a letter invites Olivia to come home to Gallant. Yet when Olivia arrives, no one is expecting her. But Olivia is not about to leave the first place that feels like home; it doesn’t matter if her cousin Matthew is hostile, or if she sees half-formed ghouls haunting the hallways.

Gideon’s short-lived run as a locally famous boy detective ended when middle school started, and everyone else—including his best friend, Lily—moved on while Gideon kept holding on to his trench coat, fedora, and his treasured film noir collection. Now he’s sixteen and officially retired. That is, until Lily shows up suddenly at Gideon’s door, needing his help. He might be mad at her for cutting him off with no explanation, but Gideon can’t turn down a case.