A mother knows best... Doesn't she?Antonia and Bea are sisters. They are both doting mothers to their sons. But that is where their similarities end.Antonia had her son tested at an early age to ensure her little angel did not possess the 'violent' M gene.Bea refuses to let her son take the test. His life should not be determined by a positive or negative result.Both of these women will go to any length to protect their sons.But one of them is hiding a monster.And there are going to be fatal consequences for everybody...