Before the rain for her grandmother's funeral stopped, Lin Wei encountered a scene in the attic of the old house that was horrifying for her: the newly replaced copper lock was engraved with the unfamiliar word "Cheng", and the dark red mark in the keyhole rubbed on her fingertips, which was sticky like blood and begonia resin; what was even weirder was that the dusty Republic of China radio suddenly rang, and a child's voice said "the third blue brick" over and over again - but this attic, grandma had clearly said, "Don't touch it in your life."
She clutched the silver key left by her grandma and searched, but the more she searched, the more frightened she became: grandma was not only "Grandma Lin", but also Lin Tang, the owner of Tangji Jianfang in the Republic of China; the fire in the Jianfang that year was not an accident, it was grandma who burned it herself in order not to use it as secret writing paper for the Japanese army; the descendants of the Cheng family He came to the door with the "IOU" from his ancestors, but it seemed that he wanted more than the Tang Jian formula... Even Chen Mo from the cultural center took out the cloth bag that his grandmother had given him. Inside, there was a sketch of the attic in an old diary. The third blue brick was circled in red with the words "Zang Mingmen" written next to it.
An old neighbor in Su Village said that her grandmother came to plant aster flowers every year and even braved heavy snow to save her children. In the drawer of Cheng's house, grandfather's diary contained a photo of a baby, with the words "My Son Yanshan" written on the back. When Lin Wei touched the stone mortar where her grandmother dyed paper, the aster flower juice on her fingertips was exactly the same color as the Tang Jie in the wooden box under the blue bricks - it turned out that the secret of Tang Jie was never in the dye. But when Cheng Yanshan barged in with a kerosene barrel, the firelight illuminated the Tangjie in his hand, and Lin Wei discovered that what grandma had hidden all her life was far more than just a recipe...
Purpose: Protect the truth and warmth behind old objects, fight against dark forces in the historical puzzle, and uncover the secrets of family and cultural relics spanning two generations.