"Thou shalt not kill." The fifth in Kieslowski's film meditations on the ten commandments, Dekalog 5 is a wretched, wrenching tale about crime, conscience and punishment. It is an all-too-straightforward and unflinching story of a nineteen-year-old boy who commits a brutal murder. Still, as in all the Dekalog films, the real story is behind the story somehow, lying in wait for the thoughtful viewer.