Eun-kyung and Ki-sik hatch a plan to set up Si-ra and Poong-ju, hoping the date will help them uncover the real reason behind Si-ra's divorce. Convinced that Poong-ju might be the mysterious test subject K-1, Ki-sik becomes determined to gather concrete proof to support his theory. Meanwhile, Marie finally musters the courage to ask her father about the truth she has long wanted to know.
