story for my major

Long long ago, in a fairy land, lived a king. He was good and wise. He had a son and two daughters. One day, a witch came to the king. She gave some peculiar drugs to the king, the princesses and the prince. Since then, everything was changed. The royal family lost their minds, the country was filled with blood soon. After that, the country was enveloped in dark mist. Nobody dared to approach.  Occasionally, some people, who got lost and stepped in, never came out again.
Half a century passed.
One day, a young man came to the edge of the mist to look for his brother, who has been lost for years. That night he came to a small old castle, which was not enveloped in mist. He wanted to stay for a night there so he knocked the door.  An old woman came out. After  staring at him for a while, the old woman let him go and shut the door. But the young man did not give up, he kept knocked the door. This time, the old lady let him in. She gave him some food and took him to the barn to sleep. She asked him to stay inside during the night no matter what happened and to leave immediately after sunrise. Then the young man went to sleep.
Midnight, this young man was waked up by a beautiful singing of a girl. Followed the singing, he came to a tower, where he found a beautiful lady was having a bath. He was captivated by her beauty and stay there.
For the following 3 days, they spent their daytime in the tower and only came out to have dinners at night. At the 3rd night, the girl took him out of the castle. They walked along the dark mist. She told him that she wanted to go back home, but her father did not allow until she completed her task.
Back to the castle, the old woman has get the dinner ready. At the moment they start eating, the beautiful girl became old and ugly in seconds. She tried to kill the man. However, with the help of the old woman, they killed her.
Old woman told him that the one they killed was her sister. She kept her youth and beauty by eating people’s soul. They were the princesses of this kingdom. She didn’t take the drug but she was struggling to watch her families killing people. She was too weak to stop them. But she have a kind of intuition that the young man would be the one to stop all these. From the old woman, the young man knew that the soul of his brother was sent to the king. He decided to do something so that he walked into the mist.......