Brothers in Arms

From the front of the book:

A frail alliance connects the city of Baldur’s Gate to the nation of Elturgard – and when vital information crosses the border without authorization, that alliance is bound to be put to the test. A visiting paladin’s moral code clashes with the organization that has kept the city safe for more than a century, and the outcome may be hard to predict. A Living Forgotten Realms adventure set in Baldur’s Gate for characters levels 4-7.