Six delegates have been murdered at a local political convention, and the police have no idea who - or what - is responsible. One thing seems clear: The killer's next target is a candidate for New York City mayor, one Theodore Roosevelt. Convinced that something supernatural is afoot, Rose and Thomas must track down the murderer before Roosevelt is taken out of the race - permanently. But this killer is unlike any they've faced before, and hunting him down will take them from brownstones to ballrooms to Bowery saloons. Not quite comfortable anywhere, Rose must come to terms with her own changed place in society - and the fact that some would do anything to see her gone from it entirely.