In 2007, archaeologists digging in a forest outside Yekaterinburg uncover a small grave containing bone fragments long suspected to belong to Grand Duchess Anastasia and Tsarevich Alexei, the two Romanov children whose bodies were missing from the family's original burial site. The film follows the forensic teams and historians who piece together what happened after the 1918 execution of Tsar Nicholas II and his family, tracing how Bolshevik guards tried to destroy the remains with acid and fire before scattering them. DNA specialists compare bone samples against living relatives, including Britain's royal family, while archival photographs and execution-site reconstructions lay out the case for identifying which bones belong to which victim. Historians walk through the decades of Soviet secrecy, rumor, and impostor claims that followed the killings, explaining why confirming the children's fate took nearly ninety years. The film treats the science and the history with equal weight, closing on what the discovery finally settles about the Romanovs' end.