Across the Lake (Fem Reader x Jason)

You are an artist wanting to take a break from your rough life. Your dad invites you to escape in a cabin in the woods. He says you can stay the summer in the cabin by yourself if you clean it. One day, while painting a scenic landscape, you see a man in a hockey mask standing on the other side of the lake. Who is he? And why do you have the feeling you have met him before?