Eve Fletcher is trying to figure out what comes next. A forty-six-year-old divorce whose beloved only child has just left for college, Eve is struggling to adjust to her empty nest when one night her phone lights up with a text message. Sent from an anonymous number, the mysterious sender tells Eve, 'U R my MILF!' Over the months that follow, that message comes to obsess Eve. While leading her all-too-placid life--serving as Executive Director of the local senior center by day and taking a community college course on Gender and Society at night--Eve can't curtail her own interest in a porn website called MILFateria.com, which features the erotic exploits of ordinary, middle-aged women like herself.