Cherry has a unique condition: her blood sends anyone who sees or smells it into a bloodthirsty mania. When she hears of a cure, she sets off across the country, turning the road trip into a zombified hell.

The word unique suggests something is singular. If the condition is unique to the lead character, then she is the only one to have this condition. If that is the case how did someone come up with a cure to a condition only she has?