Drugs were found in a car I have rented, can I beat this case in trial?

The police said they walk up to the rented car I was siting in that was parked, and saw drugs laying on the floor board of the driver seat. I said the drugs wasn't mine, nor did I know they were there. The police said he'd never seen me with the drugs, he never saw me make any furtive movement, he pulled me out of the car to search me & found nothing. He also said the drugs look like they came from under the seat. I had rented the car & only had it for 1 day when this happen. Can I beat the drug charge at trial, because I really didn't have the drugs?