Eunji is a single mother with a 4 year old son named Leo.

She and Leo live at a beautiful area near the beach,earning a living by running a cozy pension.

But one day,a mysterious musician stayed in her pension.

A mysterious musician who sings only one song every night.

Her curiousity lets her intrudes this mysterious musician's life,and this musician is totally pissed off.

What will this two happen in the end?