Ada Latia is twenty-four years old. She used to be the youngest millionaire in the cosmetics industry. She used to be married. Now, she spends her time studying ways to communicate with aliens. After all, aliens could not possibly be more cruel or deceitful than other humans.

Ada's spiteful ex-husband Rex believes autistic people like her are monsters, so she's not surprised when he calls her to share a clickbait article gleefully shouting that one autistic child has killed another at a special school in Idaho.

Rex just means to hurt her, but when Ada reads the article, it's not the lies about autism being fake that catch her eye: it's a disturbing photograph of the dead child. The image of the girl is perfect - too perfect. As if someone has committed a murder, and then carefully staged the scene to cover it up.

Ada reports her suspicions to the FBI, and the case crosses the desk of her old classmate Henry Bloodstone, who invites her to assist him. Ada's not a trained investigator. It's painful for her to come up against situations she's not an expert in. She barely remembers Henry, even though it's clear that he remembers her. But the death is a mystery - and Ada, who counts murder as one of her special interests, has never learned to let a mystery go.