The judge in a Danish town sees his illegitimate daughter facing a trial for the murder of her newborn child, and is rather sure that she will be sentenced to death. She became pregnant from an aristocrat who didn't want to marry her. The same fate happened to her mother, although he wasn't allowed to marry because of a vow he had given to his father who had to marry under rank after the girl got pregnant. As expected the sentence for his daughter is death, he asks for a pardon, but this isn't granted although he is promoted. So he decides to free her and get her out of the country at all costs.

With her husband gone and the stress of family life rising, Mom suffers a psychotic break due to postpartum depression that compels her to exterminate her children: ages 10,7,4, and 3 months. Now hope for the family's survival rests on the shoulder of Jimmy, the eldest son and surrogate man of the house. Using his wits and intricate knowledge of the farm, Jimmy must try to protect his siblings while fending off the woman he has always known and loved as his mother. Thus, it comes down to the most epic of battles, Mother vs. Son, in the most horrific of scenarios.