In Season 2 of "Project Blue Book," set in the 1950s, Dr. J. Allen Hynek continues to investigate UFO sightings for the U.S. Air Force. As more unexplained cases arise, Hynek becomes increasingly convinced that there is a government conspiracy to cover up the truth. Alongside his partner, Captain Michael Quinn, Hynek unravels a web of deceit and encounters dangerous threats. As they delve deeper into the mystery, they must navigate personal and professional challenges, risking everything to uncover the truth about extraterrestrial life.