From the introduction:
The Oracle of Delphi serves as the instigator of every mission. The players will visit the Oracle at the very beginning of every mission and be given an assignment. However, in typical mystical Oracle fashion, the exact details are not entirely clear, because she tends to speak in riddles and vague metaphors. In fact, it isn’t unheard of for players to come away from a meeting with the Oracle not understanding anything more than the place they should go to.
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This sample mission is intended to give the Gamemaster a general idea of how to form a typical Ascension to Olympus mission. This is by no means a comprehensive mission, but merely an outline to be fully developed by the Gamemaster. There are many details which are missing and the Gamemaster should fill in advance to personalize the adventure for their party.