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O Jin-u of a rich family and a female private tutor at his house are in love, but his family are against their marriage and send him to America. Before he leaves for America, they hold their own wedding and vow to love forever. But once out of sight, her devotion weakens with time and falls in love with Jin-u's friend Seong-hun. Hearing about the fact, Jin-u hurriedly returns to fight a duel with him...
After the death of Mal-Suk's father, her eldest brother, Dong-suk, becomes the sole breadwinner for his three siblings. With rumors of impending strikes and job cuts at the local mine, the struggling family faces difficulties in providing food and school fees for Mal-Suk and her brother Dong-il. This situation forces the two older siblings to move to Seoul, leaving the younger ones with their neighbors. Mal-Suk's only outlet is in her diary, where she candidly shares her hopes and troubles.
