The young woman loses her folklorist parents in an accident in Brasília. Against her husband's wishes, she decides to maintain the "Casa dos Cordéis," a cultural legacy and family heritage. As time passes, Lucila finds herself embroiled in a macabre and supernatural plot, where life and death intertwine.

Fitas Proibidas is a horror anthology that immerses the viewer in a series of macabre and supernatural stories, all revealed by Yraíra, an enigmatic entity that inhabits an old video store. Each tape unearths narratives of demons, ghosts, possessions and vampires, creating a panorama of horror and mystery. As Yraíra unravels these tapes, it not only gives goosebumps, but also offers dark moral lessons, reflecting on the fears and shadows that reside within us all.