In March 2017, Fabiola is about to celebrate her 50th birthday and the 27th anniversary of her marriage to Alfredo. To make her joy complete for these special occasions, her beloved aunt Nélida returns from the United States to visit her sister, Fabiola's mother, and participate in her niece‘s celebrations. Shortly before, Fabiola’s mother is diagnosed with Alzheimer’s disease, which affects her ability to speak. She cannot complete most of her sentences, so her daughter, husband, and other relatives help her to express herself. 

The three women go to a swimming pool and have a delicious lunch on a sunny afternoon. Afterward, Fabiola’s mother wants to chat with her daughter and sister. Thanks to the signs and sounds made by her mother, Fabiola discovers that she was adopted after her mother had a miscarriage. The desperate daughter immediately visits another aunt and asks her for more details about her adoption: indeed, Fabiola and Luis (the protagonist’s adoptive parents) were visited by a Chilean social worker who helped the couple with all the official paperwork to adopt a Chilean baby girl. 

Fabiola wants to find out more about her biological family in Chile: she knows only that she has a Chilean step-sister and the possible name of her birth mother: Elena. What family secrets will she discover and how will they affect Fabiola’s relationship with her adoptive mother?