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Doctor Stephen Vincent Strange is a brilliant but arrogant neurosurgeon - sounds a lot like Tony Stark (Must be a mustache thing for Marvel. He's also a bit of a playboy) - who loses the fine motor control of his hands in a car accident, ending his career.
Ruined, penniless and desperate to regain control of his hands, Doctor Strange turns to the rumored healing powers of a mystic hermit in the Himalayas.
Dr Strange finds the Ancient One who refuses to heal him because of his arrogance and selfishness. However the Ancient one senses that there is an innate goodness in Doctor Strange and instead offers to teach him the mystic arts.
Dr Strange refuses, but is kept from leaving due to a blizzard. While waiting he witnesses an attempt at the Ancient One's life by Baron Mordo. He confronts Mordo and is mystically shackled while Mordo leaves to continue his assassination attempt. Desperate to stop him, Doctor Strange pledges to learn from the Ancient One. The Ancient One then releases him stating that he was aware of Mordo's plot from the beginning and wanted to see what Dr Strange would do. Steven Strange becomes his apprentice and Baron Mordo declares himself his mortal enemy.
Doctor Strange, Sorcerer Supreme, Master of the Mystic and Black Arts was born.