The plan failed. Nebula’s dead, Thor captured – Stark
After the Infinity War, the Avengers made one last attempt to take down Thanos. They failed.
Loki, stranded back on Earth, and certain that his brother won’t survive another encounter with the Mad Titan, believes only one possible solution remains – time travel. The problem with experimental magic, however, is that you can never be sure of the consequences. Loki ends up far further back than he had intended. He finds Asgard at peace, his mother among the living and Odin about to proclaim Thor king.
After years of flitting from one calamity to another, Loki finds a spark of hope. This isn’t just about Thanos. Here is his chance to start at the beginning and, this time, do it right. But turning that hope to reality isn’t going to be easy.

[Marvel Cinematic Universe, time travel attempted fix-it, not-Endgame compliant]