Where Can the Rogue Marquis Run?

One lost his first love, then treated someone else as her stand-in. One lost his memory and faced suspicion at every turn because he was the Grand Tutor's adopted son. One couldn't accept his failure to become prime minister, so he set out to bring down the battle-hardened Marquis of Zhenbei and his household. As the three struggle against one another, who is using whom as a pawn? And who is the bait? Who engineered the Northern Frontier campaign that cost the Marquis of Zhenbei his life and claimed the Fifth Prince?