The story begins at the moment when the parents of twelve-year-old Nikca and six-year-old Tomas leave for the weekend, and the children have their apartment to themselves for the very first time. And without supervision! Nikca decides to put her little brother away in his room and invite her friend Gabča over, planning to order pizza, watch a horror movie on video, and just have fun. But watching a forbidden scary film is not meant for them.

The two were brought together by chance. Ten-year-old Saša ran away from home when he was suspected of setting fire to a barn with his friends. Seventeen-year-old Ruda escaped from a juvenile detention center because he attacked a guard. They met in Sasha's grandfather's garden shed, and their paths would soon have diverged if Sasha hadn't discovered that it was Ruda who had set fire to the barn and decided to force him to confess to the police so that he and his friends would not be punished. But Ruda has no interest in confessing. He wants to get away. Away from this country, far from his life in children's homes and juvenile detention centers. And to prevent Saša from ruining his plan, he takes him as a kind of "hostage"...

In the snowy Giant Mountains at the end of the German occupation, a group of child heroes rescue a downed French pilot. Their actions resemble the principle of the well-known 'telephone game' – the pilot is passed between mountain villages like a secret message – secret delivery – at school. But the children play a highly risky game. They are confronted by deadly soldiers of the occupying army, they must outwit traitors and informers and, last but not least, survive in the harsh conditions of winter in the mountains.