Alejandra is a young woman who works in the dolphinarium of an amusement park in Mexico City, partnering with Juanjo and Fina to take care of the dolphins and Keiko, a tender orca who lives in the park and entertains visitors. Alejandra studies nursing and is part of the team of park coaches. Ernesto Valverde, owner of the center of attractions, is cruel and has plans with his lawyer to kill Keiko and turn it into tacos--according to the argument of the novel would be more than 38,000 assorted tacos--and make a deal with organized crime. Enrique, an independent and handsome young man who adores animals, is the son of Ernesto Valverde and is against his father's sinister projects. Enrique becomes part of the group of coaches and meets Alejandra; they fall in love and together face a great series of problems to save Keiko. Keiko becomes the best friend of Alejandra and Enrique, and together the three give smiles and fun to many people.
