Hwa-in, a beautiful woman who ran a lighting shop at a young age, woke up in the forest. She lost all her memories in an instant... and while being hit by the rain, as if drawn by her instinct, she enters a luxury mansion. One woman and two men greet her. She beings to feel fear from the man who sneaks and peeps at her as if she's being stalked.
In Hwa and Jong Soo, who lived an ordinary daily life, face a crisis in their relationship when sister-in-law and Hyun Ah suddenly appears one day. In the past, the sister-in-law had a relationship with Jong Soo, perhaps because of that, In Hwa became more and more hateful of her younger sister.
