Kim Yoo-ra is a struggling university student in Seoul, working late-night delivery shifts just to keep herself afloat. Her life is ordinary—until strange white envelopes, unexpected meals, and unexplained gifts begin appearing around her. Someone is watching her. Someone who knows where she goes, what she does, and who gets too close. Then people around her begin disappearing. As fear spreads through Seoul, Yoo-ra realizes the mysterious stranger protecting her may be far more dangerous than the people she needs protection from. And whatever connects them has already been tied in red. 🧵