Nimona is a young shapeshifter, the sidekick to the Lord Ballister Blackheart, a villain with a vendetta--he wants to prove that Sir Ambrosius Goldenloin and his allies at the Institution of Law Enforcement and Heroics aren't the heroes they say they are. There will be, in the beginning, small acts of mischief, which will escalate into explosions, with lots of science and sharks in between.