Su Jintang traveled through time and became a fake daughter who was abandoned in the cold palace. She used a blood test to reveal her origin in public, which shocked the cold-faced general Xie Yan - he was the real Xie family bloodline. The two were forced to join forces to investigate the massacre of their family twenty years ago, but were thwarted by their adopted son Xie Mingyuan and the eldest princess Zhao Wan. Su Jintang uses modern knowledge to break the game, Xie Yan recovers his identity from memory fragments, and each supporting character hides a fatal secret: Qingdai's betrayal, Su Yan's concealment, the eldest princess's old covenant... When the truth is revealed, who is the keeper behind the chessboard?
