This documentary follows a team of archaeologists, mandated by the Louvre Museum, as they pick up where Egyptologist Auguste Mariette left-off with his discovery of the Serapeum tomb of the bull of Apis - one of the most sacred places in Saqqara, Egypt, in 1850. Mariette also managed to map out a network of underground tunnels leading to other burial sites that he did not have time to uncover. With exclusive access, we follow a team of archaeologists continue the research of Mariette.