Tiger Soup (Hawaii Five-O, gen) is the story I didn't even know I wanted to read: an extremely compelling, tightly-plotted casefic centering around 5-0's investigation into Steve's mother's death. Obviously AU at this point, but actually most of the discoveries fit pretty well with canon. In addition to being an excellent, enjoyable, and long mystery case (it's about 38,000 words), it's told from Kono's POV, which I loved. There are so few Kono-centered stories in this fandom that aren't all about her being a yenta for Steve and Danny, and I really loved the Kono we get in this story.