Finding their way back to Alesia and their home in the future, turns out to be more difficult than the time travellers imagined. War breaks out in the Mediterranean Sea and forces Katherine, Trevor and Chryséis to flee inland. Nothing here is the way they thought it would be, and who has ever heard of Egypt without pyramids? Here, they discover unbelievable books, a school of magic and that virtual-invisibility coats come in handy in prehistoric Egypt, now called Ta Mery. Somebody seems to be standing in their way and eventually, they find out the shocking truth. Can the elusive Bird God help the children get to safety in time?