When a young homeless girl dies in the latest of a string of arson attacks, Dr Rhona Macleod is called in. But here in Edinburgh she is off her patch - the Chief Fire Investigator is hot-tempered misogynist Severino Macrae, and he doesn't like to lose face. As the attacks escalate, will their growing chemistry distract them from the murderous arsonist who seems to be infiltrating their personal lives as well as their work?