邪恶的斯努克所率领的第一秩序正以前所未有的破坏力扫荡抵抗者组织最后的力量。几经辗转，蕾伊（黛西·雷德利 Daisy Ridley 饰）终于在银河一隅找到隐居的卢克·天行者（马克·哈米尔 Mark Hamill 饰），与此同时她自身的力量也正慢慢苏醒。遭到重创的抵抗者命悬一线，为了摆脱第一秩序的追杀，芬恩（约翰·博耶加 John Boyega 饰）和萝丝（凯莉·玛丽·陈 Kelly Marie Tran 饰）逃出主舰，试图找到能令他们起死回生的人物，而好逞英雄的波（奥斯卡·伊萨克 Oscar Isaac 饰）则留下来见证着抵抗者最为危机和绝望的时刻。
另一方面，凯洛·伦（亚当·德赖弗 Adam Driver 饰）和蕾伊的精神世界意外连通，他终将和自己的恩师卢克迎来决算的时刻……

Six days ago, astronaut Mark Watney became one of the first people to walk on Mars.
Now, he's sure he'll be the first person to die there.
After a dust storm nearly kills him and forces his crew to evacuate while thinking him dead, Mark finds himself stranded and completely alone with no way to even signal Earth that he’s alive—and even if he could get word out, his supplies would be gone long before a rescue could arrive.
Chances are, though, he won't have time to starve to death. The damaged machinery, unforgiving environment, or plain-old "human error" are much more likely to kill him first.
But Mark isn't ready to give up yet. Drawing on his ingenuity, his engineering skills—and a relentless, dogged refusal to quit—he steadfastly confronts one seemingly insurmountable obstacle after the next. Will his resourcefulness be enough to overcome the impossible odds against him?