You notice that they are trying to escape

Under the hood, you look to the side. One of the other prisoners is managing to loosen the wrist strings...!

You look at the other prisoner, and the two of them exchange looks, as if they are planning something. They were going to run, and you were in the middle of it. The Stark guards were very inattentive, chatting and focusing only on the road. Probably not many were trying to rebel, so they didn't even notice what they were doing.

The largest of the prisoners suddenly used the rope to hang one of the Starks and they both fell off their horse, face to face in the snow. They started to roll from side to side, fighting like animals. The Stark was never able to draw the sword. A cold, raw blade was pulled from his belt, and the prisoner stuck it in Stark Guard's bare throat.

The other did the same thing, but was more skilled. He stabbed the Stark right there on the horse, thrusting a forged dagger into Winterfell in the guard's ribs, and when he fell, he jumped on him, attacking his head.

You were pure despair. When you looked ahead, you received a blow in the middle of the face, which made you fall off your horse, on your back in the snow. The guard who was watching you described a turn with the horse and went after the first prisoner to act, the biggest. The guard drew his sword and cut off his head in a fierce blow.

You were standing up, still recovering from the blow. When you looked ahead again, he was coming at you. The remaining prisoner, in addition to you, pulled the sword from the corpse and hit the horse in the ribs, causing both rider and horse to fall before reaching you. He went to the fallen guard and finished him off with a deep blow to the chest.

You didn't even know what to do. Only the two of you are left. He had blood on his robes, his face was blackened under his hood and he was panting. He was looking at you through the darkness on his face. You didn't know what to say. Maybe he wanted to kill you. He was taller, stronger, and older.