为了营救小女孩，Sapper不惜暴露了自己复制人的身份，导致自己也身陷险境......
三名精英宇航员前往土星的卫星土卫六执行长达数年、可能存在风险的任务。团队准备进行一项高度危险的引力弹射，这任务要么将他们弹射到土卫六，要么进入深空，一名宇航员要保持对现实的控制变得越来越困难。
The film follows two prisoners in the near future who are sentenced to a lifetime of hard labor on a distant planet. As things unravel, they become increasingly paranoid and start to lose a sense of who they are and their past lives.
