One morning, Rebeca wakes up to discover that her weight has drastically increased without her experiencing any change in her appearance. As the story evolves, Rebeca, overwhelmed by her weight, that keeps increasing even more at each moment; tries to develop her daily life as usual, until it becomes completely impossible. From that moment on, Rebeca suffers a progressive deterioration that starts affecting the people around her.

This update of the 1950 western TV series changes Cisco and Pancho from wandering heroes of the old west to somewhat anti-"gringo" Mexican revolutionaries.