A bronze disc turns up near Nebra, Germany, its blue-green patina inlaid with gold: a sun or full moon, a crescent, and a cluster of stars read as the Pleiades. Later additions include two golden arcs marking the angle between summer and winter solstice, and a final arc lined with strokes some read as a solar ship with oars. The film traces the disc to the Unetice culture, whose ingot torcs, spiral bracelets, and paddle-headed pins spread across Central Europe around 1600 BCE, and to its discovery site on Mittelberg hill, a 252-meter rise in the Ziegelroda Forest ringed by roughly a thousand barrows. From that hilltop the sun sets every solstice behind the Brocken, 80 kilometers away in the Harz mountains, and the nearby Goseck circle shows the same solstice tracking centuries earlier. The disc is argued to be the oldest known portable instrument for measuring solstice angles, evidence that Bronze Age communities tracked the sun's course with real precision long before written records.