位于外太空的“礼炮7号”空间站意外与地球失去联系,工程师维克托·阿约金和退役宇航员弗拉基米尔·费奥多罗夫临危受命,搭乘联盟号T-13寻找“礼炮7号”的踪迹,当经历宇宙空间对接、太空舱寒流、空间站失火、太阳能充电系统失灵等一系列危机准备返航之时,却被告知空间站即将被击落,一场更大的太空灾难正在袭来......The year is 1985. The unmanned Soviet space station Salyut 7, which is in low Earth orbit, suddenly stops responding to commands from the Control Center. If the space station - the pride of Soviet space engineering - falls from the sky, not only will it damage the image of the country, it will also be a disaster bringing untold casualties. To investigate the failure and prevent the catastrophe, people must be sent to the station. Yet no one in history has ever attempted to dock an uncontrolled vehicle in space. To this day, this mission is considered to be the most technically challenging in the history of space exploration.