From the introduction:
A 1st level 13TH AGE adventure in four two-hour sessions
The adventurers are told by an icon that they are associated with that a magical meteorite has fallen near the city of Eldwold. Eldwold doesn’t appear on the maps of the Dragon Empire. The Dragon Empire is slightly larger than Western Europe, so only the biggest cities are shown on the map, the so-called Seven Cities. Eldwold is a relatively unimportant city right on the edge of the empire.
The adventurers are tasked by their icon to locate a gem in the heart of the meteorite and bring it back to the icon. According to the icon’s divinations, prophecies, or magical sources, the gem is named the ‘Heart of the Sky’ and may have the power to banish living dungeons to the void beyond the stars.