Sirena prepares to sing at the Salvador carnival, while her bodyguard, Augusto, and his representative, are in charge of preparing the arrival of the singer on stage and the details of her performance, although in the end, nothing goes as planned.

Sirena has died and her body already rests in a glass coffin that serves, again, to continue giving a show. This fact does not please Augusto at all, who begins to look for clues and talk to some people to discover who murdered Sirena, including Paulino, Sirena's ex-boyfriend.

Augusto discovers the diary at Mother Marina's house and suspects that she is involved in Sirena's death, but she refuses to give him more details. Meanwhile, he continues looking for clues to clarify what happened.