The Mad Doctor was a science fiction novel about a young doctor with mysterious abilities who accidentally obtained a special ability and began an adventure. He traveled to a future world and found that he could cure all diseases, so he began a journey to save the world. In the process, he met all kinds of people, experienced all kinds of dangers, and finally became a legendary doctor. His ability was recognized by everyone and also attracted the attention of some villains. In the process of saving the world, he continued to learn and improve his ability to become a real doctor.