A possible concise summary is:
This is a summary of the movie Doctor Strange, which tells the story of a neurosurgeon who becomes a sorcerer after a car accident that ruins his hands. He learns from an ancient master who draws power from the dark dimension, and he has to stop a former student who wants to bring the evil Dormammu to Earth. He uses a powerful relic called the Eye of Agamotto, which contains the Time Stone, to create a time loop and bargain with Dormammu. He becomes the protector of the New York sanctuary, but his ally Mordo turns against him and vows to eliminate other sorcerers.
Here are some key facts extracted from the text:
1. Kai Cilios is a former sorcerer of the Ancestral Order who stole a page from the forbidden book of Colostrum to access the dark dimension and contact Dormammu.
2. Doctor Stephen Strange is a neurosurgeon who lost the use of his hands in a car accident and sought healing in Nepal.
3. Ancestral is the supreme sorcerer who taught Strange and others how to use the energy of other dimensions to conjure spells and weapons.
4. Strange used the Eye of Agamotto, which contained the Time Gem, to reverse time and stop Dormammu from consuming Earth.
5. Ancestral died after being stabbed by one of Cilios' followers and Strange became the protector of the New York sanctuary.
6. Mordo left his path as a sorcerer and became evil, saying that there are too many sorcerers in the world and stealing their magic.