Been There, Done That

Plenty of thirtysomething women would be thrilled to look like a teenager. But journalist Kathy Hopkins wishes she could be taken a little more seriously-or, at the very least, order a glass of wine without producing ID. Now her youthful appearance is forcing her into an undercover assignment she could do without: posing as a freshman at a small liberal arts college where, rumor has it, a secret prostitution ring is flourishing.

It could mean a career-making exposé. But right now, pretending...