Last we saw Annie, she had finally defeated Henry Wilcox and was making her escape from Hong Kong. But following that ordeal she didn’t return triumphantly to Langley. Instead, she disappeared without a trace.
But now, four months later, Annie is back on the grid and ready to jump in to work. Though Calder and Auggie suspect that there’s more Annie isn’t telling them about her mysterious four-month absence, when Annie’s former nemesis Khalid Ansari turns up on U.S. soil the CIA has no choice but to send Annie back into the field to find out why he’d take the risk of returning. Annie and her local CIA contact manage to track down a visibly scared Ansari, and though he’s shot before he can tell them much, they manage to find a connection between Ansari and two Chicago-based Crimean-American brothers named Borz and Mykola Altan.
As Annie runs down the Altans in Chicago, Joan returns from maternity leave to find that she’s been passed over for the promotion to DCS in favor of Calder. That is, assuming Calder can get his personal affairs—which seem to involve a steamy relationship with a mystery woman—in order first. And while Joan heads back to her job running the DPD, Arthur mulls a new job offer from a former student named Ryan McQuaid who now runs a private security firm.
As it turns out, Arthur isn’t the only one with a link to McQuaid. Borz Altan once worked for McQuaid Security, so Annie meets with the Navy SEAL-turned-CEO to see what he can tell her about his former employee. McQuaid doesn’t offer Annie much (besides a dinner invitation) but she soon figures out that the brothers are planning an imminent terror attack. Unfortunately, though Annie’s got Borz in her sights, she loses him when she suddenly collapses on the street. Evidently Annie has returned from her months away with a secret—one that could be life or death.
Now, Annie must hide her medical condition from everyone at the CIA—Auggie included—as she scrambles to stop the Altans. And though she initially suspects that the Altans are targeting the Chicago Board of Trade, it soon becomes clear that the brothers’ plan is much bigger, and much more destructive, than anyone had imagined.