Theresa is a young, (very) single couples counselor in Chicago. While she's great (well, okay) at keeping couples together, she can't seem to lock down a guy for herself. And the fact that she tends to get attached (well, neurotic) after just one date doesn't help either.
Cut to Mr. Wonderful moving into the office next door: beautiful, bulgy bicep-ed Will. It's obsession at first sight. And no obstacle or (ugh) girlfriend is going to keep Theresa from being with him. She'll ruin relationships, sabotage dates, push people out of the closet — mixing and matching her clients until it's just Wonderful and her.