Need a female to be a "Messenger".
I actually did this one a little while ago but it seems to have died. It's set in a dystopian city where gangs have taken over. The streets are patrolled and maintained by Police Guards (PGs). It's their job to bring back some kind of order to the city. One of their missions is to eliminate or capture Messengers. These people are known to deliver important documents, messages and parcels across the city to gangs and rebel groups. Although they use the underground, the decay of the city has caused many tunnels to collapse, and thus they are forced to run across the surface.
As I came up with the idea whilst watching the "Running Man" (and borrowing plenty of elements), it's going to be a homage to a lot of the old 80s action flicks, combined with B-movie pornos. 95% of the Messengers arewomen -- solely because they are smaller and more able to squeeze through the tinniest of gaps. They wear bright spandex bodysuits (because they're so fast at running, they've been nicknamed the "Neon Blur") while the Police Guards wear heavy armour and have hulking appearances -- too slow to catch them. Your typical dodgy 80s fashion.
The young woman I need is going to be the star of the plot. Either she's an experienced Messenger, or an ex-Police Guard which has been kidnapped and forced to run and risk being killed by her former comrades, or something else... that's entirely up to you! The story begins with a dangerous Police Guard being transferred to the city, who has been tasked with stopping Messenger activity once and for all... and he becomes determined in catching her.