MN stands for Marissa Navarro, a strict, heartless, domineering, and fiery heiress and daughter of a wealthy landowner, who instills and sows fear among its populace. She gets the ire of one of the tenants, Ada. However, she meets her match in Armando, another lowly tenant, and eventually falls in love with him. Marissa's strange character is a result of her sad experiences with another man, Oscar.