A lost tale referenced only in footnotes. Something about a monarch who trades her kingdom for a singing turnip. The turnip never sings. The index lists the queen’s fate as “Unclear. Possibly became the bog. Possibly always was.”

As the brothers attempt to clear Sebastian’s name, their journey uncovers a massive global terror plot. The duo must work together—using a combination of high-tech gadgetry and crude, chaotic ingenuity—to save the world while trying not to kill each other in the process.