Bort Bragirth, a dwarf trader, hired you all as part of his caravan security detail. You reached the small village of Etran's Folly, and stopped overnight at The Feedmill Inn, where you met a bunch of the locals and had a meal (lots of turnips). A drunken bar brawl broke out, and when it settled down, Bort was face down in a bowl of poisoned pudding. The local Barney Fife (incompetent sheriff) assumes you're guilty of the crime and ordered you not to leave town until the magistrate arrives in a month and determines what to do with you. But he's also said if you find the killer, then you're free to go. Through talking to locals, you know that the goblin Phinnick was the one who delivered the bowl of pudding, but then he served a lot of food last night. He's also apparently disappeared. No one knows where he lives. He's a goblin. They don't much care about him. Going through Bort's books, Galahad found that Bort was making a delivery of alchemical supplies to someone initialed H.
You have also picked up a side quest from a drunken former paladin Sir Laurent Krent from Lastwall living in a nearly collapsed abandoned cottage who is being haunted by the ghost of a friend.
Any other questions? I think part of the problem is how they have structured the mystery. You're giving like ten people to talk to, most of whom really know nothing. Phinick is the key, and the adventure says he stays in hiding for two days (you're on the first day after the murder). If it helps jumpstart things, I can bring him out, if you think you're at a dead end.