When blind Zhang San rescued his paralyzed sister-in-law Lin Xuemei, she received a mysterious bead that restored her sight and awakened her medical powers. He fought off the village tyrants and was forced by Lin Xuemei's brother, a gambler, and a loan shark when he used his powers to ripen lychees. Fortunately, the wealthy businessman Zhou Jun came to his aid. He used lychees to cure Zhou Nu's strange disease, discovered ancestral medical books and determined to save the world, and brought hope to the countryside with his lychee business.
