

Modern elite assassin Morgan Calud dies and transmigrates into a woman with the same name. After Morgan's father died in battle, her mother disguised her as a boy from birth so they could maintain their position in the Calud family. As Morgan grows up, she yearns to reclaim her female identity but fears that discovery would mean death for both her and her mother. Planning to escape with her mother before her secret is exposed, Morgan is unexpectedly noticed by Shane Burke—the Aetheria Dynasty's only duke with a different surname, a man of overwhelming power and ruthless temperament. He brings her back to his estate, and from then on, she must outwit him daily just to survive.

Ruby and Steven fell in love in high school but separated due to family feuds. Ruby initiated the breakup; Steven agreed, believing she'd discovered his father's role in her father's death. Afterward, Steven changed his surname to Gibson, founded Gibson Tech, while Ruby became a freelance writer. Though never contacting her, Steven monitored Ruby's life, learning of her workplace harassment resignation and continued single status. Now successful, he orchestrates her business trip to the city of Syntherra. They reunite, but Ruby mistakenly thinks he's married and withdraws. Even after clearing this misunderstanding, unresolved family conflicts keep her distant. Steven persists, proposing cohabitation without publicity and dating without marriage discussions. Still deeply in love, Ruby succumbs to his gentle persistence, agreeing to a short-term relationship.