The party was hired on by a trade company rebuilding the road between Waterdeep and Baldur's Gate. They did this to continue following the cult because the dragon cult planned to continue north to the construction base. They successfully tracked the cult's stolen treasure to the roadhouse, only to discover it was suddenly missing from the locked strongroom! The party decided to stick with the cult as they continued north only to be assaulted by an overwhelming number of trolls. The caravan was captured and the cult fled north while the party fled south back to the roadhouse. Deciding their only option was to track the treasure into the Mere of Dead Men, they followed the obvious trail into the swamp, easily defeating a group of giant frogs. The party is weakened and in an unforgiving, hostile territory.
But you don't have to take my word for it. My son, a second grader, filled in for the roll of Jamna Gleamsilver and decided to write up his own game summary: