Arturo De La Riva has spent 10 years of happy marriage with Eugenia, with whom he has a daughter named Aranza. However they do not imagine that Sonia, Eugenia's cousin, is obsessively in love with Arturo in secret, and that this feeling will lead to a terrible tragedy. Meanwhile, Isabel López Cerdán has been married, for two years, to Fernando Córdova, whom she loves above all else. Eugenia passes away, coinciding with the time Isabel discovers that Fernando is a swindler. After these blows, Isabel and Arturo are united by destiny in a paradisíaca beach of Mexico, initiating a relation that will have to overcome different obstacles like Sonia's manipulation on Aranza, so that she does not accept Isabel.