Yeon-jae spent five seasons in a detention center, falsely accused of a crime she didn't commit. Upon her release, she heads to the hideout <Echo Research> just to survive and seek revenge. As a member there, she runs into the bastard she has been searching for all this time. "I won't let you get away with framing me. I'm going to expose everything." "You should. I actually want Yeon-jae Jung to expose it, too." However, on the day she realizes her target of revenge is always one step ahead of her, she also discovers that her true goal lies elsewhere. The path she must cross to reach her revenge. A man of unknown background, Sa Hee-eon. Face-to-face, he gave off a bizarre aura. A chilly demeanor, and an expression so cold not a single drop of blood would flow even if pricked with a needle. There was something hidden deep inside. "Did you come here to sleep with me?" He smiled so sweetly as he said those words, carrying a languid yet twisted malice.