A piece of jade pendant brought together the grievances of two generations.
Shen Yan never thought that in the process of tracing the cause of his father's death, he would uncover so many secrets - the old engagement between his mother and Uncle Shen, the shocking conspiracy hidden in the Japanese army's lock box, and his "cousin" Ling Chen who appeared out of thin air.
When Ling Xiao kicked open the study door and asked, "So we are cousins", Shen Yan thought this was the most ridiculous situation. Unexpectedly, the jade pendant that can open the Japanese password box is just the tip of the iceberg.
Under the crystal lamp of Paramount, the bomb countdown was ticking; in the cellar of the mission hospital, the so-called "relatives" suddenly raised their guns at each other; in the secret room of Su's house, a female corpse wearing a Japanese military uniform was holding the Shen family genealogy tightly in her hand...
Shen Yan was forced to join forces with Ling Xiao, not only to crack the Japanese army's germ warfare plan, but also to uncover the tangled mystery of their blood relationship with Ling Xiao. When Mishima Yuichi brought the secret of 731 to the surface, and when the most trusted people around them exposed their flaws one after another, they discovered that this chess game spanning twenty years had already trapped everyone in it.
