Kim Myung-wu studies modern music in Germany and meets Ji-suk, a pianist. She disappears on the day of his recital to get money for her mother's treatment in hospital and no word from her for a month since. He sees through her mother's funeral when she's gone. When there's a fire in the village, Myung-wu witnesses Ji-suk playing piano at the church watching the flame. She sets a fire at a store she was trying to get the money from but the owner reported her. She blamed her mother's death on the store owner and revenged with the fire. She completes the Pyro-Sonata with help of Myung-wu hiding her from police.

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