Tang Xian did not have biological parents who loved her, but she had adoptive parents and a husband who loved her. She met him who loved her the most at her best age. His brother said when he got married, "Tang Xian, you will always be my sister, the apple of the Tang family's eye." She met the best of him at her most beautiful years, and she should have been happy. However, the two separated due to Shen Yan's insistence on work, "If you want to defend the country, then I will protect you." Tang Xian was admitted to the Medical University, but he still couldn't save his lover who was defending the country. Later, the only news that came back was the news of his death and the square box. She studied medicine for him, but she still couldn't save him. She couldn't even see him for the last time, and the only thing that accompanied her was the small square box.
Concept: Sweet first, then cruel