Directed by Byun Sung Hyun, *My P.S. Partner* tells the story of Yoon Jung, who, instead of calling her boyfriend, accidentally dials the wrong number and—without realizing it—ends up having a very steamy erotic phone call with a complete stranger. When Yoon Jung’s relationship with her boyfriend begins to fall apart, she meets Hyun Seung, the stranger with whom she’d had that infamous steamy phone call, and falls in love with him...