Intrigue and Battle on the Coast of Impiltur
From the introduction:
After the changes of the Spellplague, aboleths and their servants assail the coasts of the Sea of Fallen Stars. Yet there are those who would defend the land-dwellers against the ancient aberrations. One of these men is Lord Faden. But his tower is in decline and many fear that it will soon fall to the enemy. Unable to prevent this catastrophe, the members of the Grand Council of Impiltur send a group of young heroes to retrieve a magical artifact from within the tower which should not fall into the hands of the enemy. However, Lord Faden is less than happy to part with this powerful item...
A 4-hour adventure for three to five 2nd level characters.