In the summer of 1979, in Thüringen, in East Germany, two families put together a crazy plan. They are desperate to leave the DDR for the 'West' and plan to flee in a homemade hot air balloon. After sewing and tinkering for weeks, the amateurs make their first attempt. Meters from the West German border, their balloon suffers from the rain and crash lands. Luckily, they manage to avoid being caught by the police. However, the wreckage from their escape attempt is found and that triggers a desperate manhunt. The tension rises as the families determine to try again, and a race against time ensues. On the one hand, the authorities, desperate to track down the traitors, become aware that a second attempt is being planned. On the other, the would-be escapees, conscious of the search drawing ever nearer, need to build a more robust, weatherproof balloon - and avoid leaving too many clues. 为了自由，分秒必争。《气球》有哪些细思极恐的细节？。为什么非走不可呢？。 故事发生在1979年冷战期间，冈特（大卫·克劳斯 David Kross 饰）和皮特（弗莱德里奇·穆克 Friedrich Mücke 饰）身处东德统治者的铁腕政权之下，虽然被限制了行动，但是两人并没有放弃对于自由的追求，他们利用长达两年的时间，策划了一起惊天大逃亡。 两人动用了手边一切能够得到的资源，制作了一个巨大的热气球，他们打算用最朴素也是最直接的方式，带领着他们的家人逃往西德。然而，就在一行人即将越过边境之际，热气球却因为意外而坠毁了，与此同时，他们的行动也引起了秘密警察的注意，针对他们的追捕很快展开了。一边躲避追兵，冈特和皮特还要一边想方设法制作新的热气球，一场与时间的竞赛开始了。
