Paige begins to realize the difficulty in dating a mortal when Henry tries to immerse himself in her magical world. She finds herself even more conflicted when a suitor, Sir Simon Marks, arrives hoping to convince her to marry him so they can become the ultimate magical couple. Piper also faces a romantic decision when she runs into her old flame, Greg , and begins to wonder if she is ready to put Leo's death behind her. Meanwhile, after Billie finds her missing sister Christy, who has been held captive by demons for several years, she and Phoebe try to help her cope.