Game, Interrupted

In winter 1979, during their semester break in Ankara, Turkey, two siblings aged 8-9 find their way out of boredom by playing games in their apartment. However, something goes wrong that day. Their grandmother falls over the tent that they were playing in and interrupts their game. While trying to figure out what happened, they notice a strange intruder waiting at their door. They have to find a solution before their mother returns from work.