Jenna makes a wish on her 13th birthday to be 30 and grown up. When she wakes up the next day she finds herself, miraculously, just weeks away from her 30th birthday. The new, older Jenna is a successful magazine editor with friends in high places and a lion's share of potential suitors. The proplem is that her mind hasn't matured with her body and Jenna finds it a little more terrifying than cool to be living on her own.

At her thirteenth birthday party, Jenna Rink wishes she were thirty and wakes up to discover that she has an apartment in New York City, a job at a fashion magazine, and a sexy boyfriend, but inside she is still thirteen.