Firefighter academy student Nanase Takemine is a promising rookie fire investigator who is haunted by her parents’ fiery death. Three years ago, she saved a man from a burning building. But he was no innocent victim–he turned out to be the arsonist responsible for the death of her parents. Now this serial fire-starter has started help her solve fire-related crimes. His intentions seem good, but how can Nanase reconcile his willingness to help with his role in her own personal tragedy?