The genius pianist 'Baek Tae-se', known as the second Beethoven.

His artistic world, which seemed immune to frustration, is shaken by a severe slump.

In front of 'Tae-se', 'Kang Seol-ah' appears and breathes new inspiration and emotions into him.

'Tae-se' demands a physical relationship with 'Seol-ah' in exchange for paying off her debt of 215 million won...

"10 million won."

"For every time we sleep together, I'll deduct 10 million won from your debt."

I don't know what drives me crazy,

But you are mine, Kang Seol-ah.