A new super agent from the renowned security agency ACUARIO is in charge of a spectacular operation to prevent a robbery. In this action-packed and dangerous mission, he meets two inexperienced characters who will become his future partners. One is a young man supported by his parents who adores women, and the other is a carefree and optimistic hustler. All three fail in their first mission. A woman they were supposed to protect is kidnapped by a gang of criminal brothers, who complicate the super agents' lives at every turn. In a game of betrayal where nothing is as it seems, the new Shark, Dolphin, and Mojarrita will manage to solve the case and assert their new, unconditional friendship.

Malena is an attractive woman, psychoanalyst of profession and tango dancer by devotion. One night she kills accidentally a man and decides to hide her crime. Days after, she sees in the news the man’s wife and little daughter: he was a policeman. In her plan, Malena meets Carlos, work companion of the dead policeman who is investigating his disappearance. He is of Vasc origin and they call him “the Sabina,” because sometimes he answers using phrases of the songs of the artist. A strange fascination captures Malena with “the Sabina,” the man who has to discover the crime she committed and take her to prison. Since the beginning, the relationship between them is passionate and transgressor, without moral limits.