A ruthless arsonist writes in fire. Only two people can read the message: the investigator he's daring back-and the firefighter who once broke her heart.

When federal arson specialist Camille Rivera returns to the city she swore off, the first face across the briefing room is the last she expects-Lieutenant Noah Hart, the man who vanished after a deadly blaze. Now a calculated string of infernos crawls across the map, each burn smarter, each signature bolder, smoke-blackened walls whispering a taunt: smoke shows truth. Forced into partnership, Camille and Noah must decode a pattern that turns every crowd into kindling and every exit into a trap. Evidence points to an explosives savant with a personal fixation-and the past they buried keeps sparking: unfinished apologies, a touch that still grounds him, a choice that cost a life. With a landmark event in the crosshairs and a mastermind who studies response times like scripture, professionalism won't be enough. To save a city-and the second chance they never took-they'll have to step into the heat together and trust what once burned them.