Xu De (played by Lam Ka-tung) is the reincarnation of the wise venerable who made a wish of "not becoming a Buddha until hell is empty". Xu De and the famous doctor granddaughter Feng (played by Chan Miu-ying) are in love with each other, and Princess Wenrui (played by Annie Tong) is also fascinated by Xu De's talent and orders him to take the imperial examination. Xu De refused Princess Wenrui's order, which annoyed the latter and directly led to the death of his granddaughter Feng. The sad Xu De became a monk under the advice of Lao Budai (played by Qin Huang), hoping to rebirth his granddaughter Feng through his good deeds. In the process, Taizong (played by Cheung Siu-fai) was influenced by Xu De, and Princess Wenrui repented of her crimes and became a nun. Who knew that Xu De's various actions made the Queen Mother (played by Bai Yin) very dissatisfied, causing the demon monk Haotian (played by Shan Liwen) to do evil in the world and destroy all living things.