Lina is in an impossible situation - forced to rescue the employer after she was caught stealing from a Dokkaebi emperor. He's made a bargain with her. She has two weeks to kill him, and they will both go free, able to save her sister. But fail, and he will kill her instead. As she spends time there plotting his demise, things start to slowly change and they Lina realizes that she and Rui are not as different as she once believed.
This was a really interesting angle on the Pied Piper, and I liked the focus on Lina and realizing who she was, what she was, and that she can continue on without the Talons.