The series tells the true story of Evandro Ramos Caetano, a 6-year-old child who disappeared in April 1992, on the coast of Paraná. The boy's body was found a short time later without his hands, hair, and entrails, and a group confirmed that they used the child in a macabre ritual. The case at the time became known as "The Witches of Guaratuba".
The premiere of "O Caso Evandro" brings twists and turns to the case. A missing child recognizes himself in the series. The defense attorney sues the state. And Osvaldo Marcineiro decides to speak out.