Whilst the Avengers and their allies have continued to guard the world for any one hero from dangers too large to handle, a new threat has emerged against the cosmic shadows: Thanos. A despot of inter galactic infamy, his aim is to amass all six Infinity Stones, artifacts of ability, and use them to inflict his will on all reality. Everything that the Avengers have fought for has headed up to the moment - that the fate of Earth and existence itself has not been more uncertain.