Kelly is an electronic forró singer in search of ascension. She does shows in the backlands of Brazil, but does not have many opportunities. For her career to become a success, she ends up killing some people along the way. Investigated for the murder of three men, she uses her itinerant presentations as an escape tool as she becomes known as Serial Kelly.

On the eve of leaving the informal work sector and being hired, Samuel is haunted by his work instrument: the engineer mascot.