Yi, a retired soldier, has lost everything he loves-his wife, his daughter, and his home. He seeks refuge from his heartache by plunging into a secret mission for the World Emperor. The assignment takes him to the doorstep of a brothel, where he witnesses the madam beating a young girl. Drawn by the child's striking resemblance to his lost daughter, Yi rushes to her defense and negotiates for her purchase-after all, how hard can it be to care for one little girl? But between the child's inquisitive nature and the dangerous secret she carries, he gets more than he bargained for.