Plot

When the National Assembly suffers a catastrophic attack, Minister of Environment Park Mu Jin must find a way to lead Korea through the ensuing chaos.

Park Mu Jin is a former professor of chemistry and now holds the Minister of Environment position. He doesn't have ambition, personal beliefs or political sense. One day, the cabinet is gathered in the National Assembly for the president's address. A terror attack takes place, killing many government officials, including the President and ministers. Park Mu Jin is the highest ranking government official left alive. He doesn't want the position, but he must sit as the acting president for 60 days. Park Mu Jin chases after the person or group responsible for the attack as he grows as a national leader.—AsianWiki

Episode 01 While driving with his family, Park Moo Jin sees that the unthinkable has happened at the National Assembly and soon finds his life turning upside down. Episode 02 Surrounded by generals and officials clamoring over what must be done, Park Moo Jin decides to pursue a hunch despite opposition from his own advisers. Episode 03 Han Na Kyung makes a startling connection after uncovering a clue. As a political rival incites public fear, Park Moo Jin weighs his options. Episode 04 A survivor is found at the disaster scene. Cha Young Jin's briefing about approval ratings and presidential election polls makes Park Moo Jin uneasy. Episode 05 Park Moo Jin's live interview alarms the public and the Blue House staff. Jeong Han Mo questions Na Kyung's suspicions about Oh Yeong Seok. Episode 06 As the staff tries to find ways to allay the public's growing fear, Park Moo Jin makes an unexpected suggestion. Na Kyung asks Yoon Chan Kyung for help. Episode 07 Han Ju Seung returns to the Blue House, Na Kyung divulges a troubling detail to Han Mo, and Yoon Chan Kyung threatens Park Moo Jin with impeachment. Episode 08 Young Jin thinks he's found his candidate. Na Kyung uncovers footage implicating Young Seok and urges Han Mo to brief Park Moo Jin before it's too late. Episode 09 The staff tries to control rumors brewing around Park Moo Jin, but he remains reticent. Ji Yoon Bae tells Han Mo that he's the only one who can save him. Episode 10 Park Moo Jin receives distressing information from an unforeseen source -- and is told not to trust anyone. Cha Young Jin still doesn't have his answer. Episode 11 Kang Dae Han interrogates Na Kyung, who insists on briefing Park Moo Jin in person. The staff doesn't know what to make of Young Seok's actions. Episode 12 Young Seok's opportunistic maneuvering doesn't go unnoticed. Choi Kang Yun fears that Park Moo Jin has made his choice. Na Kyung probes Young Jin. Episode 13 Young Seok has cutting words for Park Moo Jin. Despite Joo Seung's counsel, Young Jin starts preparing his candidate. Na Kyung tries to assure Han Mo. Episode 14 As his advisers wonder whether Park Moo Jin is making decisions as an acting president or as a candidate, Young Seok informs him about his intentions. Episode 15 Park Moo Jin tries dealing with a military threat by taking a gamble on Lee Kwan Mook. Young Jin receives photos putting a candidate in a delicate spot. Episode 16 With limited time left as acting president, Park Moo Jin and his staff scramble to solve the case -- but the mysterious tailor remains an enigma.