October 10, 2145: eighteen-year-old Charity Northquest's whole future is ahead of her--and the future sucks.   October 11, 2145: she unexpectedly has a chance to fix it. When her best friend is reported killed, but then re-appears the next day as an old woman, everything Charity has been taught is called into question. Even if she does not believe in time travel, she has little choice. So the ill-prepared Charity travels back to the mysterious and captivating 21st century where her single purpose of changing the future fades with the increasingly more urgent question of whether she can survive the past.