"we are in dire straights here my friends, our forces aren't enough to deal with all these foe." the Governor is practically feint at this point
"the only safe way out of the castle is a sly port, designed to allow us to counter attack anyone battering the front gate. But the sally port is under attack this minute! I have forces there defending, but we must win that fight before any rescue missions can be attempted."
He points out the tunnel to the sally port
"once it's clear, dozens of townsfolk have barricaded themselves inside the temple to Chauntea, but raiders have it surrounded. The attackers tried setting fire to the stout structure but had little success. Now they've deployed an improvised battering ram. It's only a matter of time, possibly minutes, before the temple's main doors crumple under the assault, leaving the villagers inside helpless."
At that moment Castellan Escobert the Red rushes up to the governors side. Escobert is a shield dwarf with knotted, tangled, bright red hair. As master of the keep, he carries an enormous ring of iron and brass keys to the many locks in the keep.
addressing your group, he says:
"The guards have spotted a new threat. Raiders are trying to set fire to the town's mill. If it burns, we'll lose our stockpile of flour and we won't be able to grind more for months. I'm trying to assemble enough defenders from here in the keep to defend it through the rest of the night, but that will take time. You'd do us a great service if you could get to the mill quickly and drive away the raiders before they can set it aflame. You'll need to defend it until our force arrives to take over, but it shouldn't be more than fifteen minutes behind you. There's an old tunnel, I can get you out of the keep without being spotted....."