Recently released Netflix film “My Name is Loh Ki-wan,” starring Song Joong-ki, draws from Cho Hae-jin’s 2011 novel, “I Met Loh Ki-wan,” if only very loosely. The film diverges significantly from the novel in characterization and narrative to the extent that one could argue it tells a wholly distinct story. In the cinematic adaptation, Song plays the titular role of a North Korean refuge...