The life of a woman who has become a hostess to support her younger sister is sacrificed by the corrupted and unethical power. When Siwoo has realized her sister's identity, begins to suspect about the strange circumstances of her death.

This work (私の夜はあなたの昼より美しい, Watashi no Yoru wa Anata no Hiru yori Utsukushii) was first acclaimed by Japanese readers in 2011 when its short story version was published by Shueisha in the Japanese cartoon magazine Grand Jump. After the series became a big hit in Japan, it also introduced to Korean people the next year (2012) as a more substantial genre-based series.