The Billionaire's house was very long mansion which had many rooms. Apparently many people were arriving there and Leon was curious to know about it. He entered the house and a man came and asked," what is a child doing here". Leon uttered at the moment that he also wanted to become one of those people called doctors. The man began to laugh loudly. Leon said that he wanted to meet the man. The man caught Leon and dragged him out of the house. As Leon overheard, that the man he was searching for lived in the top most floor, he started to climb the house. After reaching a particular height Leon daunted and an urge came to his mind and that was to get to the land. However his willpower didn't allowed him to do so. He climbed even higher and reached the top most floor, entered the room and saw that the man was working . The man said," you will be approximately 8 years old, but still your will power is remarkable. Tell me, do you want to be one of my men, the 'doctors'. Leon replied that he wanted to be one. The man said i won't look your age, height or anything. What I require is service, will you be capable to do it," asked the man. Leon replied," I am at your service". The man said one more thing and that was about a small challenge. Currently 25 people want to become a doctor, I will only choose three who are blessed with exceptional talent for the job. The challenge is I will give you the copies of book and the tope three people who cure the bedridden men from their illness will be give the position of a doctor and you time starts now, the man threw the book to Leon. Leon caught it and made a dash for it. Leon only have one week left for curing them.