Two families live on the same staircase. One fine day, dads boycott moms, and moms in response - dads. The reason for this is the accumulated family troubles: computer games of one, iron drill of the second, female fatigue, etc. The hostages of the situation are children who are forced to live in two opposing camps. In an attempt to reconcile their parents, they only aggravate the situation and find the only way out - to call and ask their grandfather to come. With his arrival, even more fun begins.