Lu Baichuan's disciple Gu Pingan, a hidden medical saint with divine medical skills yet extremely money-obsessed, was tricked by his master with a fake debt of 680,000 and a marriage contract to go down the mountain and enter the Shen family as a son-in-law. After the wedding farce, he saved the critically ill Shen Qingshan and signed a three-month contract marriage with Shen Zhiyi. Gu Pingan practiced medicine and made money all the way, successively defeating the Qin family's conspiracy, sparing no effort to use forbidden arts to rescue the poisoned and dying Shen Zhiyi, and joining forces to destroy the harmful "Changsheng No. 1" project. The Qin family perished, the truth of the fake debt came to light, and the two broke free from the constraints of the agreement, held a true wedding, and practiced medicine to guard the Shen family.