It's 1967, and Kitty Granger is about to accidentally become a spy. A working-class girl from London's East End who's on the autism spectrum, she's spent sixteen years hiding her "peculiarities" from a world that doesn't understand them. But after her hyper-awareness helps her survive a chance encounter with a Russian spy ring, two British secret agents offer her a job. Kitty's first mission draws her into a conspiracy led by a prominent politician, who's also an unreformed Nazi sympathizer. With help from an unusual team, Kitty must use her wits, training, and instincts to get out alive. And she might as well save the country while she's at it.