The lawyer Choi Yoon-ha, once called the undefeated legend, loses everything in a mysterious fire. To cover her only surviving sibling's medical expenses, she starts a risky deal with Sung Ji-hoon. "I need a woman who won't stand out." "Is that my mission?" Yoon-ha finds herself increasingly entangled between those who desire her, both good and evil. Can she uncover the truth behind the fire that took everything from her?