When Brent Cleary, demonstrating a beta-test protective "nanosuit" to potential customers, gets trapped in a massive pipeline explosion, only the nanosuit saves him. Smart nanobots integrated into the suit will do whatever it takes to protect the wearer …

The explosion kills hundreds. It's so destructive that—despite his protective suit—Brent suffers severe injuries. He needs first aid—and lots of it—that the bots scurry to provide …

But once inside his body, what will the bots do? Will they continue in their mission to improve and repair? How does one repair the imperfection that is a human being? Where and when does the bots' mission end?