The young female CEO of a new ridesharing app must stop a serial killer who's using the app to lure victims into his car. The young female CEO of a new ridesharing app must stop a serial killer who's using the app to lure victims into his car. The young female CEO of a new ridesharing app must stop a serial killer who's using the app to lure victims into his car. The young female CEO of a new ridesharing app must stop a serial killer who's using the app to lure victims into his car.