1947: Adventurous Radcliffe graduate Catherine “Cat” Killeen cancels her wedding and upends a future that no longer suits her. At the behest of her professor and hungry for a challenge, Cat arrives in Virginia to work on a confidential military project. A student in cryptoanalysis, Cat is already ahead of the game—to assist in rooting out Soviet spies who have infiltrated the US. Joining the “government girls” of Arlington Hall, Cat gains the respect of her superiors and the friendship of her peers. Then, on a night out in DC, Cat runs into Jonathan Dardis.

Halley James knows her marriage is over. But she’s not prepared for the rest of her life to fall apart too. She just lost her job at the forensics lab. Her dad needs emergency surgery. But the biggest blow comes back home in Marchburg, Virginia, where she discovers her mother didn’t actually die in a car crash. Her mom was murdered—and her father lied about it all these years.

Incredibly resilient and determined to rewrite the possibilities of life with a chronic illness, Penny is ready to leave her family behind and go to college by herself, accompanied by a snazzy new wheelchair and a backpack full of confidence. When she meets the charming actor CJ, who is studying the same course, there’s an immediate spark. But Penny worries that her life isn’t fast-paced enough for CJ and assumes they’re better off as friends.

In May 2005, authorities discovered the Groene family murdered in their Idaho home. The family’s youngest members—eight-year-old Shasta and her brother, nine-year-old Dylan—were nowhere to be found. As a community prayed for their return, Shasta and Dylan were already miles away in the woods of Montana at the hands of serial killer Joseph Edward Duncan. After a harrowing forty-eight day ordeal, Shasta was rescued. In many ways, her survival story was only beginning.

For five friends vacationing on Block Island, it was a summer to remember. How could they forget it when only four made it back to the mainland? Now, half a decade after Zoe Gilbert’s unsolved disappearance, Callie Sutter invites estranged friends Meg, Tess, and Lindsey—the last to see Zoe on that fateful trip—to reunite on the anniversary of the mystery that tore them apart. Back on Block Island, Callie reasons, they can come together again, memorialize Zoe, allay old resentments and recriminations, and put the past to rest. But it won’t be so easy.