On May 26, 1987, Jenna Rink, a gawky girl, yearns to be popular, but the only way she can get the ruling clique—the “Six Chicks”, led by the unkind Lucy “Tom-Tom” Wyman—to attend her upcoming 13th birthday party is by doing their homework. Jenna’s best friend, the geeky boy Matty Flamhaff (with the nickname of Beaver because he looks like the star of Leave It to Beaver), arrives early to the party to give her a bright pink, dream dollhouse that he built for her. He sprinkles his second gift, a packet of glittery “magic wishing dust”, on its roof.
The Six Chicks soon show up with the cutest boys in class and make Jenna play “seven minutes in heaven”. While Jenna waits, blindfolded, in a dark closet, thinking a popular boy she has a crush on is about to enter, the Six Chicks vanish with all the boys, half the food and Jenna’s completed homework. It is Matt who walks into the closet, to Jenna’s horror. She locks herself in the closet and cries, wishing to be 30; above her, the glittering wishing dust from the dollhouse gently rains down.
The next morning, Jenna awakens in a gleaming Fifth Avenue apartment. Jenna’s dream has come true: It is now 2004, and Jenna, at first utterly baffled, particularly by the handsome hunk in her shower, realizes she has magically turned 30 overnight, with no idea of what happened in the intervening 17 years.