In the aftermath of a nuclear disaster, a young woman named Ann Burden finds herself alone on her family's farm, struggling to survive. She meets a man named John Loomis, who claims to be an engineer and has managed to find his way to the valley where Ann lives. Despite initial reservations, Ann allows John to stay with her and they gradually form a close bond as they work together to sustain their lives. However, their relationship is put to the test when another survivor named Caleb arrives in the valley. As tensions rise between the two men, they begin to reveal their darkest secrets and true intentions, ultimately leading to a tragic confrontation that will determine the fate of their lives forever.

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Some movies that have similar genres and were produced around the same time as Z for Zachariah include Passengers, Her, Never Let Me Go, The Space Between Us, Backlight, The Discovery.

Z for Zachariah was released in theaters on November 27, 2015.