Bolt Crank is an "explorer"--a mercenary who only accepts jobs that fits his moral standards. Even so, explorers like him are rarely trusted, and employment--both in getting and also doing the job--is hazardous. However, despite the fact Bolt says it's the only job he's any good at, he's also the best explorer around. Moreover, he has a unique ability. He's able to eat anything at all, and later can reproduce it wholly intact and functional! As an enigmatic man of few words, it's hard to understand someone who can do something so strange, whose only skill involves taking dangerous jobs for money, and who despite it all, just wants to be normal. In a mysterious world of advanced technology and weird science, it seems that some things never change.