New Ground Theatre's current show, David Schulner's An Infinite Ache, appears to be a conventional love and marriage story. A man and woman meet, fall in love, and get hitched - nothing unusual. But the script is so intricately crafted that we see snapshots of the couple as they progress through a partnership of more than five decades and take on sex, marriage, children, and death - in a mere hour and fifteen minutes. The fast-paced, natural dialogue travels seamlessly through the years, with no specific scene divisions. Time simply progresses.