Athena and her friends have a time traveling mishap in this thirtieth and final Goddess Girls adventure! Athena can´t believe it´s almost her little sister Hebe´s birthday...or that it´s been a year since Athena found herself at Mount Olympus Academy. It turns out Athena and her BFFs, the Goddess Girls, remember very different versions of Athena´s first day at school. To see what really happened, they use a spell to travel back in time! The girls go back a year earlier but to ancient Rome instead of Greece--where they meet the Roman equivalents of themselves! With time running out for them to get back to Greece--and for Hebe´s celebration!--can the Goddess Girls work with their new friends to find their way home?