Gracia Plena (Full of Grace) takes place in Buenos Aires during the year 1919. The play opens up in a boarding house where men loudly play poker and gamble while women talk in the room nearby. The main character, Maria Teresa, is currently with a man named Juan Carlos who is poor, probably unemployed, and clearly enjoys partying and gambling. She is worried because she discovers she is pregnant, but is scared to tell Juan Carlos for fear that he will make her abort the baby. The other women in the play are also seen to be in unhappy relationships with men who are gamblers and “tangueros”. The term Tanguero, used in the play by Maria Teresa to describe her husband, refers to men who lived a life of partying and Tango dancing. Tango dancing, at the time, took place in Cabarets and Dance halls where men went and oftentimes danced with prostitutes.
As the play continues, a series of characters enter the boarding house, each bringing laughs to the audience. Lawyers, couples, and friends enter as they make remarks on current events, discuss fashion, and grieve to each other. A series of arguments between couples starts to break out, with the men’s inability to financially provide for their families at the center of the discontent. The women are discontent with their financial status, but a rigid marital structure limiting divorce rights for women as well as children maintain the couples together. The comical nature of this scene ends once Maria Teresa brings up to Juan Carlos that she is pregnant, followed by Mecha, another women in the boarding house, revealing to her friends that she is to go to jail for her role in introducing a girl into Prostitution. Additionally, Sarita enters and tells of how on her way to work at the cabaret, her child saw her but she was too ashamed to approach him. The misfortunes of the women center around the burden that children have when men do not support the child.
The play livens up again with the entrance of a Tango band into the scene, and characters begin to get excited and dance. Maria Teresa does not join the dancing as she is distraught due to the situation with her child, and she begins arguing with Juan Carlos. The argument is juxtaposed with the dancing, and tempers flare as the music quickens until eventually a pause in the arguing occurs and the music stops. Juan Carlos and Maria Teresa go off stage, and she is then brought back onstage after having stabbed Juan Carlos in the eye as he refused to acknowledge the child as his and was going to force Maria Teresa to have an abortion.
The second scene of the play opens up with Maria Teresa in a women’s prison, where she is being held for attacking Juan Carlos. She gives a speech on redemption and motherhood, but although she believes that motherhood morally redeems a person, it does not redeem them in the eye of the law. Two other women enter the scene who are also prisioners and like Maria Teresa, are there due to actions involving uncaring husbands and unwanted children. The play ends in heartwarming fashion, as Maria Teresa’s baby is taken from her and brought to an orphanage while she is off screen, only for her to realize on her return. This ending highlights Gonzalez Castillo’s pro-feminist attitude when writing the play, as he reveals the sacrifices and pain that lower class women experience at the time due to mens actions. 
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Gracia Plena was performed 166 times, and was the second most popular play of its year.