Ye Si Ren finds out that his father died a while ago. Ye Si Si, Ye Si Ren's younger brother, orders Lan Ling Wang to give him a letter from his father. But when Ye Si Ren takes the letter, he gets poisoned. To get the antidote, Xia Tian, Xia Mei, Xia Yu, Ren Chen Wen, Han, Xia Mi and Wa Ge go out and search for the legendary doctor Yi Xian, the doctor who once worked for the Ye He Na La family. The doctor agrees to give them the antidote if they manage to pass three tests.