In 2023, Shen Yumo, a financial upstart in S City, China, discovered a mysterious mahogany door in a top apartment late at night. At nine forty-seven every night, this door opens on time, connecting the front line of the Anti-Japanese War filled with gunfire in Zhonghua S City in 1942. Outside the door were the regiment leader Gu Yebai, who was covered in scars and had firm eyes, and his soldiers who stood firm in the blood and fire.
Inside the door, Shen Yumo went from shock to trust, from watching to intervening. The first antibiotic and the first compressed biscuit he handed out quietly changed the tiny process of history. The mottled pocket watches, handwritten poems and stories from the trenches brought by Gu Yebai made Shen Yumo re-examine the prosperity and peace he lived in.
When the exchange of supplies turned into a matter of life and death, when Shen Yumo took the risk to open the door to a private clinic to save the wounded, and when Gu Yebai put on modern clothes and stepped into the brightly lit Bund - two souls separated by eighty-one years illuminated each other amidst the flames of war and neon.
When Shen Yumo was dealing with family strife in the boardroom, he thought of Gu Yebai calmly setting up defenses in the rain of bullets; when Gu Yebai was short of food and medicine in the position, he thought of Shen Yumo's words "come back alive to drink soup." One door, two worlds, meeting on time for seventy-three days. They stick to it in the torrent of their respective times, just for the words every night: "How was today?" "It's okay, how about you?"
Until the eve of the decisive battle, there was heavy artillery fire on the other side of the door, and it was difficult to defend against hidden arrows on this side of the door. When Shen Yumo crossed the threshold with military supplies, and when Gu Yebai held the medicine from the future in the trench, they finally understood: some agreements are worth going through the flames of war;
Purpose: soul mate