As the Seer had informed you, you now all have effective free reign of the city and it's nearby surroundings. Which he'd like you to use to help further the City Guard's investigation into the mysterious cult known as the "Shadows of Solarium"
Captain Gilneas of the city guard also informed you that you are allowed to help out the guard with any other cases they may have, such as other crimes or reports of creatures
There are also locals you can talk to for information, as well as the Undercity which has a noticeboard of thier own problems as well
The most you recall about the Undercity was reports of a strange light deeper within the caves, possibly linked to thefts of food and a possible murder as well