[Two male protagonists + Qiangqiang + Ancient Detective + Slow-heat HE]
Xie Wujiu, a prisoner on death row, was secretly brought into the palace on the eve of his trial. Lying in the ice room was a man who looked exactly the same as he did today, even his old injuries from youth were exactly the same. But the living Xiao Yanheng stood behind him and gave him seven days: to find out who the real emperor was, and to find out who wrote the old case of the Xie family three years ago.
The two were once young confidants who understood each other best. One became an emperor, and the other became a prisoner convicted by his own hands. Now the courtiers have become strangers one after another, the secret edicts are written in exactly the same handwriting, and the soldiers who died in the frontier army have returned to camp. All clues point to the "Substitute Courtyard" left by the late emperor - someone is quietly replacing the entire court with a substitute who has been trained for many years.
Xie Wujiu relied on bone marks and evidence to pursue the truth, and Xiao Yanheng paved the way for him as an emperor. They don't trust each other, but they can only leave their backs to each other. If no answer is found after seven days, the next person to be replaced may be the living emperor.
