2 a.m. in a rain-lashed biotech lab. Dr. Ilse Brandt has injected herself with her own gene-editing nanomachine, and it has decided that everything about her is a typo. Ex-air-racer Rae Calder, who hasn't flown with a passenger since the crash that grounded her, lets herself and her micro-ship be shrunk to the size of a cell and injected into the dying scientist. A microscopic science adventure through arteries, immune cells and the spiral of DNA.