It's the hottest summer on record. The streets are shimmering, walking outside is like walking into a furnace, and yet, someone is still setting fires. Milwaukee homicide detective Ellie MacIntosh is called to an arson scene and finds bewildered homeowners, an unidentified corpse, and cryptic clues. Is it a random killing? The ritualistic nature of the crime points to no, and Ellie fears that the already-oppressive summer is just starting to heat up. Ellie doesn't like her obnoxious new partner, Jason Santiago-and he doesn't like her. Yet when she becomes convinced that their investigation is tied to a cold case, Jason finds himself grudgingly starting to agree. It might be hot as hell outside, but the details of the brutal homicide chill him to the bone...
