In a charming Victorian house with its wraparound porch and creaky wooden floors lives Guest, whose impossibly youthful appearance makes her 72 years seem like a complete lie. Her graceful figure and radiant beauty could easily fool anyone into thinking she's barely out of college, drawing stares and double-takes wherever she goes.

Jacob, her grandson who's a freshman at the nearby state university, has settled into this bizarre daily routine of living alongside Guest. Whenever they step out together, they're guaranteed to turn heads, with everyone automatically assuming they're "boyfriend and girlfriend." Guest's frantic attempts to correct these misunderstandings, paired with Jacob's smug satisfaction as he stands beside her, only make people more convinced they're witnessing young love in action.

And so begins this wonderfully chaotic life—a grandmother and grandson who, to the rest of the world, look like nothing more than a couple head-over-heels for each other.