Jay Weissberg The sunbaked, drought-stricken terrain of southeast India is a major determinant of the action in P S Vinothraj’s beautifully crafted, precisely plotted debut, “Pebbles.” Taking a simple premise with all the focus and penetration of a perfectly constructed short story, the writer-director transforms the drama of a young boy dragged between villages by his abusive alcoholic father into a larger, unforced statement about toxic patriarchy, limited resources, and the silent, enduring