The opening lines tell us everything: it's all about understanding people! The story follows a team of brave Soviet soldiers who are preparing to build a bridge beneath the surface of a river, hoping to launch an attack. Their plan is to assemble it piece by piece, secretly, so they can cross a wide and swiftly moving waterway. Surrounded by Nazi forces, their guide, “Lisa” (Marguerite Chapman), and “Kulkov” (Paul Mu…