Claire "Mac" Woods—a professor enjoying her newfound hotshot status at an academic conference—finally has the acceptance and admiration she has long craved. But at the conference's hotel bar, Mac is surprised to run into a face from a past she'd rather forget: the moneyed, effortlessly perfect Gwendolyn Whitney, Mac's foil, rival, and former best friend.

When she arrived in New York on her eighteenth birthday carrying nothing but $600 cash and a stolen camera, Alice Lee was looking for a fresh start. Now, just one month later, she is the city’s latest Jane Doe. She may be dead but that doesn’t mean her story is over. Meanwhile, Ruby Jones is also trying to reinvent herself. After travelling halfway around the world, she’s lonelier than ever in the Big Apple. Until she stumbles upon a woman’s body by the Hudson River, and suddenly finds herself unbreakably tied to the unknown dead woman.

Ciara and Oliver meet in a supermarket queue in Dublin and start dating the same week COVID-19 reaches Irish shores. When lockdown threatens to keep them apart, Oliver suggests they move in together. Ciara sees a unique opportunity for a relationship to flourish without the scrutiny of family and friends. Oliver sees a chance to hide who - and what - he really is.

For 10 years Lucy has enjoyed her job poring over rare tomes of literature for the Harvard Library, but she has not enjoyed the demands of her family's social whorl or her sort-of engagement to the staid son of her father's law partner. But when her 10-year relationship implodes, Lucy realizes that the plot of her life is in need of a serious rewrite.

What happened to Jacques Gaillard? The brilliant teacher at the École Nationale d’Administration, who trained some of France’s best and brightest as future prime ministers and presidents, vanished ten years ago, presumably from Paris. This ten-year-old mystery inspires a bet—one that Enzo Macleod, a biologist teaching in Toulouse, France, instead of pursuing a brilliant career in forensics back home in Scotland, can ill afford to lose.