Amid the treacherous upheavals of the Kingdom of Wushan, Ruan Dongsheng, frail from birth, is confined to a secluded mansion, with the scent of medicine and his weakened body serving as chains on his life. Then, through a bizarre twist of fate, he swaps bodies with Lin Wan'er, the daughter of a military family. One is a sickly young master who cannot even lift a chicken; the other is a skilled martial artist and heroine. At last, their utterly different lives intersect.
When Ruan Dongsheng grips a long sword and feels his blood race on the battlefield, and Lin Wan'er faces ledgers and poetry, trying to unravel the mysteries of the inner residence, both must adjust to each other’s lives while being swept into court intrigue and conflicts in the martial world. Their adventure of body and soul has begun. Can they find their way home amid fate’s cruel tricks?
