The full plot of Doctor Strange 2016 follows Strange from a ruined surgeon to the protector of the New York Sanctum, and it ends with a time loop instead of a punch.
The film opens in Kathmandu, where Kaecilius and his followers raid Kamar-Taj, kill the librarian and steal pages from a ritual book that belongs to their former teacher, the Ancient One. In New York, Stephen Strange loses the fine use of his hands in a car accident. After modern medicine fails him, he hears of a former paralysis patient who healed himself, and he travels to Nepal to find out how.
The Ancient One shows Strange the astral plane and other dimensions, and he becomes a student beside Mordo, while Wong guards the library. Strange secretly reads forbidden texts and learns to bend time with the Eye of Agamotto. Through these studies he learns that Kaecilius serves Dormammu, ruler of the Dark Dimension, and wants to pull Earth into it.
Kaecilius destroys the London Sanctum, and his zealots then attack the New York Sanctum, where Strange is badly hurt and is treated by his former colleague Dr. Christine Palmer. Strange also discovers that the Ancient One has been borrowing power from the Dark Dimension to prolong her life, which sours Mordo on her. Kaecilius fatally wounds her, and she dies after a last conversation with Strange.
In Hong Kong, the Dark Dimension begins merging with Earth and Wong is killed. Strange turns back time to undo the damage, then confronts Dormammu inside a time loop that kills him again and again. Worn down by the repeats, Dormammu agrees to leave Earth and take Kaecilius and his followers with him if Strange will end the loop. Disillusioned, Mordo gives up magic and walks away, and Strange settles into the New York Sanctum to keep training and protecting the world.