After a serious car accident, Łukasz discovers that the blue door in his new room leads to an alternate reality.
Tomek lives only with his mother, because his father, Alek, left for the USA to earn some money. Unexpectedly, the man arrives home with a bunch of presents but no explanation as to why he has come back. Everybody seems happy but something is in the air.
Twelve-year-old Iwo lives in a small, post-communist town that is home to the old and destroyed Black Mill – once a place of work for many parents. Breaking the promise to not approach the old mill, the children accidentally unleash its evil powers. From that moment, nothing will ever be the same again as people and things start to disappear.
