Magee Sinclair has had it up to her sassy short hairdo with the financial difficulties a recent rash of blunders has caused her family's advertising agency. How will she prove she deserves the promotion her father has in mind for her when she keeps making silly mistakes?

New client Justin Kane's goal to expand his bike stores hinges on a distributorship deal with a bike manufacturer he needs to impress during a couples mountain-biking weekend. He's supposed to bring his steady girl. But Justin's girlfriend dumps him, and he needs a woman to replace her. To masquerade as her. By tomorrow. Magee, an expert mountain biker, is the perfect choice...

Or so he thinks.

Major trouble for Magee, who isn't the expert she's claimed in this comedy of errors abound with fake identities, ex- lovers popping up out of nowhere, and a whole lot of door- slamming in the middle of the night.