Crimson Thread

By day, Dr. Han Soo-ah is a celebrated neurosurgeon - brilliant, respected, and adored for her compassion. But behind the mask of professionalism lies a chilling truth: she's a serial killer who hunts corrupt men who abuse their power, executing them with surgical precision and leaving no trace.

She lives by one rule: never get emotionally attached.

That is, until she meets Ethan Kim, a cold, emotionally distant CEO known for his ruthless mind and untouchable aura. From the moment she sees him, something inside her shifts. He's not like her targets - he's careful, controlled, and strangely... broken. She doesn't want to kill him. She wants to protect him. Obsessively.

As they begin a slow, tension-filled relationship, Ethan finds himself drawn to Soo-ah's warmth and mystery. But he's also investigating a string of high-profile deaths connected to a shadowy figure with surgical knowledge. The deeper he digs, the closer he gets to the woman who's becoming his weakness.

Now, Soo-ah must balance her growing love with the darkness she can't escape.
Because the one man she can't kill - might be the one who exposes her.