The story follows Dan Nuea, who is kidnapped after being mistaken for his twin brother, Duen Nao. During this ordeal, he crosses paths with Jayden, a brooding young man who was raised to be an emotionless assassin. Seeing how Jayden is conditioned to blindly follow orders without any personal autonomy, Dan Nuea decides to take him under his care. As they spend time together, Dan Nuea acts as a sanctuary for Jayden, unknowingly filling the void in the assassin's heart and healing his past trauma.