The Log Cabin

Luca finds himself stumbling through a wood, having lost his sense of direction whilst escaping a little unpleasantness at a bar. As darkness descends, he searches for a way back to civilisation.
Oblivious to the stranger wandering across his land, Aaron prepares to retire for the night. He doesn't expect visitors to his cabin and he certainly doesn't expect that knock at his door.
How does Aaron react to the late night intrusion? How does Luca explain the blood on his shirt?
How does the log cabin figure in all of this?