As the Avengers and their allies have continued to protect the world from threats too large for any one hero to handle, a new danger has emerged from the cosmic shadows: Thanos. A despot of intergalactic infamy, his goal is to collect all six Infinity Stones, artifacts of unimaginable power, and use them to inflict his twisted will on all of reality. Everything the Avengers have fought for has led up to this moment – the fate of Earth and existence itself has never been more uncertain.

As Scott Lang awaits expiration of his term of house detention, Hope van Dyne and Dr. Hank Pym involve him in a scheme to rescue Mrs. van Dyne from the micro-universe into which she has fallen, while two groups of schemers converge on them with intentions of stealing Dr. Pym’s inventions.

On Halloween night at a horror theme park, a costumed killer begins slaying innocent patrons who believe that it’s all part of the festivities.