The poor and innocent María Mercedes must raise her family on her own. Her father is a drunk and her mother left her and Meche's siblings. A professional street urchin, she does whatever she has to do to keep food on the table and a roof over her family's heads, no matter how ungrateful they are. Santiago del Olmo is monstrously wealthy and has a beautiful mansion in the richest part of city. Although he is dying, he isn't in peace knowing that his villainous and money-hungry sister-in-law, Malvina, will be his sole heir. One day, Santiago is in the garden when he spots Meche. A large proposal, a marriage, a will, and a conniving plan by a diabolical Malvina will turn the lives of everyone in the house of del Olmo upside down - especially that of Jorge Luis, Malvina's tormented son with whom Meche falls in love.