Build a movie plot around this: What part of the host is accessed? Memories
A:
The human race has been taken over by small parasitic aliens called "Souls". They travel to planets inserting themselves into a host body of that planet's dominant species while suppressing the host's consciousness. They access the host's memories, and occupied hosts are identifiable by silver rings in the hosts' eyes.A human on the run, Melanie Stryder, is captured and infused with a soul called "Wanderer." Wanderer is asked by Seeker to access Melanie's memories in order to discover the location of a pocket of unassimilated humans. Melanie's consciousness, however, has not been completely eliminated, and it struggles to regain control of her body. Melanie and Wanderer carry out an internal conversation and debate with each other, forming a friendship.Wanderer shares with Seeker that Melanie was traveling with her brother, Jamie, and her boyfriend, Jared Howe, to find Melanie's uncle Jeb in the desert. Wanderer admits that Melanie is still present, so Seeker decides to be transferred into Melanie's body to get the information herself. With the help of Melanie, Wanderer escapes and makes her way to the desert, where she is found by Jeb, who takes her to a series of caves hidden inside a mountain where the humans (including Jared and Jamie) are hiding.Wanderer's presence is met with hostility by all but Jeb and Jamie. Melanie instructs Wanderer not to tell anyone she is still alive, since it would provoke them, though she later allows her to tell Jamie. Wanderer begins interacting with the humans and slowly begins to gain their trust, forming a bond with Ian O'Shea.Seeker leads a search party into the desert to find Wanderer. They intercept one of the shelter's supply teams, and in the ensuing chase, Aaron and Brandt commit suicide to avoid capture. During the chase, Seeker accidentally kills another Soul, leading her superiors to call off the search.Returning to the caves, Jared and Kyle move to kill Wanderer, causing Jamie to reveal that Melanie's consciousness is alive. Jeb and Ian accept this, but...