Kang-wook, a law student at Seoul National University, finds himself in a tight spot financially after losing contact with his family in North Korea. He sells his own blood at a hospital to make ends meet, and there he meets and grows close to nurse Jin-young. As Kang-wook faces financial difficulties, Ki-yong, a son of a landlord's agent, appears and tricks Kang-wook into joining left-wing activities. Ki-yong's true identity is revealed by Yoon-ae, a friend from hometown, leading to his arrest. Meanwhile, Kang-wook and Jin-young marry with the blessings of Professor Park and their friends, while Kang-wook's friend Do-hyeon struggles to hide his feelings for Jin-young. Their sweet days together come to an end with the outbreak of the Korean War, separating them. Jin-young, unable to wait for Kang-wook any longer, decides to flee the war with Do-hyeon. Kang-wook, hiding at Yoon-ae's house, is eventually arrested by Ki-yong and the leftists, who had been freed from prison.
Song Young-chang
Jin Yeong
Han Young-su
Woo Yeon-u
Kim Seung-hwan
Kim Sun-kyung
Nam Seong-u
Bang Hee
Kim Nam-il
An Jin-soo
Sin Chan-il
Na Jae-ung
Won Jong-hyeon
Kim Bo-sung
Choi Il
Mun Mi-bong
Jo Sun-mook
Seo Pyeong-Seok
Yu Hwa-sik
Beak Song
Yoo Myeong-sun
Kil Da-Ro
Ma Do-Sik
Hong Chung-Gil
Yun Seon-bin
Park Da-jeong
Joo Sang-ho
Park Jong-seol
Kim Hee-ra
Choi Gen-Je
Jang Jeong-Kuk
Jang Cheol
Yoon Il-bong