The critically acclaimed movie Annihilation explained some of its complex themes, but still elicited many questions among viewers by the time the credits rolled. Alex Garland’s 2018 sci-fi Annihilation follows an investigative group as they enter a mysterious quarantined area referred to as The Shimmer. Inside The Shimmer, biologist and former soldier Lena (Natalie Portman) attempts to uncover secrets that could help save her husband, Kane (Oscar Isacc). The basic concept of Annihilation comes from The Southern Reach Trilogy by Jeff VanderMeer. Despite the connection, Annihilation is vastly different from the book it’s based upon.
https://screenrant.com/annihilation-story-explained-questions-answered-lena-shimmer/