Nina is a musical talented girl.  Even she is still young, she knows how to play piano.  However, she did not know that her biological father is the devil.  Her mother died when when was a baby.  And, her  greedy aunt is the one who took care of her. Her aunt is a gambler.  When she lost all her money, she sell the grand piano, the only one possession of Nina.  Then, Nina is very upset of what her aunt did.  So, she wanted to use her power to kill her aunt.

At midnight, her aunt heard someone is playing the piano.  Then, the mysterious piece was played by Nina.  As she is listening to the music, she could not breath, then fell on the floor.  So, she died in heart attack without any biological reason.

After Nina played the piano, she said to herself, “I did my part. It is finished.”