Katie is a curvy 18 year-old virgin: she loves comics, drawing, and spending time in her geek den in their basement. After an erotic experience with her best friend, Scarlett, her dormant sexuality is completely awakened. Driven by the desire to attract guys, Katie changes her dress style to reflect her new-found sexiness. To her surprise, her blossoming is instantly noticed by her hunky stepbrother who just returned home from university. Unable to keep his hands off her, their relationship escalates from familial to red-hot lovers as Brett becomes increasingly infatuated with her, in the process revealing a secret he'd been keeping for years.