Marvel infinity war,  great conflict.   Knowledge of the story is rather limited.  Reading comic books was never possible.  Not until much later that became interested in comic books.  World wide web makes much easier to read them.

The story around infinity war is simple powerful ancient stones.  Stones fall into hands of death.  Stones process the power of infinity able to control whatever.  Universe attacked half of life destroyed.  Heroes from every galaxy join together fighting.  Hand of death reason for this destruction.  Turns out wants to impress a love interest.   Conflict is massive in scale and price.

Movies are not strictly accurate to comic books.   Stones are found in different places.  The concept behind each stone remains the same. Created by the Cosmic Entities,coming from different aspects of the universe,  Stones are space, mind, reality, power and time. Infinity Gauntlet combining stones together.  Only the most powerful can survive using the stones.   The power contained allows you to shape everything.

Thanos is called the hand of death.  Based on mythology, version of that concept.   Fallen in love with death herself. The concept of death in marvel universe is a character.  The same thing is done for cosmic entities.  Various characters based cosmic entities.  Marvel yet to unleash cosmic entities.

So far happy with marvel universe.   Each movie covers different character.   Looking forward to infinity war.  Years of work in one giant climax.  Much ground is missing like cosmic entities.   Before that spiderman home coming.