Matilde is an overweight woman who leads a boring life. She lives in Villa Lugano. Her free time is made better by the appearances of Vanina, a girl she meet in the community center. They share an interest for everything related to national television, soap operas and gossip. During a strange robbery, Matilde´s husband is murdered, leaving her in a difficult economic situation and social marginality. An intelligent and romantic Detective investigates the circumstances of the murder. Stained of sexual tension, the relationship between the Detective and Matilde is both funny and refreshing. When Matilde is able to identify the assassin, her life takes another spin. She instinctively kills her husband´s murderer and keeps his cellphone. Intrigued by a confusing text message and the possibility to earn some cash, Matilde begins to do the hitman´s jobs that appear in the cellphone, although in an amateur way. Because of her success, she meets Teresita, a funny old posh woman that teaches her how to spend the money she earns as someone from the high society would. Matilde becomes a totally different woman. She goes from a boring life where nothing matters to one filled with excitement and danger. She must protect both Vanina and her romance with the Detective. After her hits get in the way of the Sheriff´s  agenda, she is submerged in a turbulence of moral and dangerous decisions to save the people she loves and avoid her own death.