That’s a killer hook. Immutability turns every block into evidence you can’t erase, but it also locks in the dark side. Think about how an attacker could plant a transaction and then use it as a red herring while the real crime is buried in the metadata. Layered forensics, hidden signatures, a counter‑move from a vigilant investigator. You can play with that tension—every move on the ledger is a chess move, and the villain’s checkmate could be the only thing that stays untouchable. It’s a tight puzzle, and the intrigue will keep readers guessing. Keep the narrative tight, let the technical details shine, and you’ll have a story that’s as precise as a block timestamp.