A bronze disc smaller than a dinner plate turns up on the black market in Germany, offered by looters who dug it out of a Bronze Age grave and want £300,000 for it. Archaeologist Harald Meller tracks the sellers and recovers the disc in a police sting, then has it tested to confirm it is genuine and roughly 3,600 years old. The film follows the analysis that identifies its gold inlays as the sun, a crescent moon, and a cluster of stars matching the Pleiades, an arrangement that points to real astronomical observation rather than decoration. Researchers compare the disc's imagery to what is known from Egypt and the Near East at the same period, arguing it shows a level of skywatching not previously credited to Bronze Age Europe. Interviews with the archaeological team walk through how they dated the object, traced its likely burial site near Nebra, and pieced together why someone buried something this valuable in the ground. The disc's authenticity, once disputed, becomes the film's central case to make.