Eduardo, a teacher who heads a theater group at his school, the Troupe dos Seis, made up of students Tecão, Paty, Bruno, Fabi, Zepa and Michele. The group will perform at their school's end-of-year party, but as there is no place available to rehearse, the teacher decides to conduct the rehearsals in the old mansion of Barão Alfredo, his grandfather. What he doesn't know is that the place has two unusual inhabitants: a couple of ghosts who can now go back to scaring and messing with people.

Sem Sinal is the fourth webseries (later compiled into a movie) released by Viihtube on her Youtube channel. The story unfolds after a 77 year old curse begins to haunt 5 youtubers trapped in a studio with no communication devices.