The series resolves its central mysteries through several pivotal revelations:
- The Double Agent Identity: Han Seung-hee is indeed Song Jae-hee. She accepted training as a North Korean operative under Agent Cha Jin-soo in order to infiltrate Seoul, protect Hoon, and help him escape political persecution.
- The Political Coup: Prime Minister Jang Seok-joo arranged the presidential heart surgery to incapacitate the President and seize executive power, expecting Hoon to comply under threat.
- Jae-joon’s Forgiveness: Jae-joon abandons his ultimate revenge against the paralyzed Chairman Oh Joon-gyu after realizing that vengeance will destroy his own humanity and his love for Soo-hyun.
- The Bridge Resolution & Epilogue: Agent Cha shoots Hoon and Jae-hee on a Seoul bridge, echoing the Budapest fall. Years later, both survive; Jae-hee gains asylum status, and she reunites with Hoon as they run a peaceful, rural community clinic.