Seoul prosecutor Park Chung-woo has earned a reputation for being extremely stern, awkward, and uncompromising, accustomed to keeping everything under his own control. Honest and principled champion of order. As a public prosecutor, Park Jung-woo easily wins lawsuits, but over time, public defender Seo Eun-hye increasingly crosses his path. She always takes the side of the accused and skillfully uses the presumption of innocence, and in the debate with the prosecutor skillfully defends her case. Seo Eun Hye is a controversyist, and her heated arguments with Park Jung Woo often escalate into open conflicts. The situation escalates when Park Chung Woo begins to notice bouts of amnesia.