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After a heart-fluttering date, Joonho, a heart surgeon with a perfect smile, and Jisun, a free-spirited teacher-librarian, share a special night. The next day, they meet at a police station with completely different memories. A shocking polygraph result turns their lives upside down.
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Next episode: S1 E5, Friday 13 November
Trailers, featurettes, clips and behind the scenes