In the eerie and unsettling "Sala Escura," nine unsuspecting moviegoers are invited to a preview session at a large city hall, only to be drawn into a twisted world of horror. As they watch a screening of a disturbing film, their reality begins to unravel, revealing that they're trapped inside the very same theater. The lines between fiction and reality blur as they become the stars of a gruesome slasher movie, with a killer dressed as Bate Bola, the carnival clown, stalking and terrorizing them one by one. Will anyone survive this harrowing descent into madness?