The documentary "Mummifying Alan" follows a group of scientists in the UK as they attempt to solve the 3000-year-old mystery of how the ancient Egyptians perfectly preserved mummies for thousands of years. They experiment by mummifying a modern cadaver named Alan using the same embalming techniques as ancient Egypt. Interviews with experts and a voiceover narrate the process as the scientists seek to unlock the secrets of how the ancient Egyptians achieved such long-term preservation of human remains.