Lucky arrives as travel companion of qualified Chinese doc Li Ping Ping in mine town Diggers Point. There teacher Vicky had cornered the medical market, which is also claimed by peddler quack Dr Toxys. Luke accepts to serve as exemplary patient for both Li's acupuncture and Vicky's Western medicine, which attracts customer, Luke helps prove the quack's malice and disprove his attempt to discredit both rivals. When the mine collapses, all medical help is needed, and the cause of the epidemic found.