Mayte is a separated woman and mother of two children who makes a living with many difficulties selling kitchen robots. Overwhelmed by its precarious economic situation, it takes advantage of a meeting of the AMPA of the school of its children to propose a demonstration of the machine to which Lourdes, wife of a policeman; Virginia, a young pregnant woman and mother of a small child, and Amparo, a long-suffering grandmother who takes care of her grandson in the absence of her daughter. The day of the demonstration happens an unexpected event that will unite the fate of these four women: they will be totally accidentally involved in a murder that will introduce them to a delirious spiral of criminal acts to try to preserve their secret.