Mo Xue, an orphaned substitute bride, takes the place of the Mo family's daughter to marry into the Fu family, wedding Fu Jinxiu, who was blinded and disabled in a car accident and has become eccentric and gloomy. On one hand, she cherishes her dream of traditional Chinese medicine, desperately striving for the chance to study medicine to heal Fu Jinxiu's damaged nerves; on the other hand, she must navigate around the hypocritical and scheming older brother-in-law, Fu Mingyu. Covered in thorns and deeply trapped in the shadows of past betrayals, Fu Jinxiu tests Mo Xue in every way possible while quietly falling in love with her. While protecting him, Mo Xue also has to hide the earth-shattering secret of her substitute marriage and cope with the Mo family's endless entanglements. When lies collide with true feelings, can the two in their dark cage save each other and break free from the shackles of destiny?