The temple complexes on the island of Philae were discovered by European explorers in the 18th century and are among the largest sites of ancient Egypt. Philae was declared a UNESCO World Heritage Site in 1979 and has been a popular destination for culturally interested visitors from all over the world ever since. In this documentary, the fascinating story of the sunken temple sanctuary from the time of Cleopatra's dynasty is told in detail for the first time.