Thalia is gentle, curious, and quietly broken. She has spent years trying to understand the human mind, hoping it might help her make sense of her own. But when she is assigned to observe a notorious serial killer, her carefully balanced life begins to slip. What starts as a university task soon becomes deeply unsettling. The man she is meant to study becomes interested in her instead. His words linger. His attention feels personal. And slowly, Thalia realizes she is no longer just watching a monster, she is being pulled into his world. In this dangerous dance between sanity and obsession, the music only stops when he decides it will.