That's a Wrap (2023)

Mason Maestro has just directed what he considers to be his masterpiece, a film titled 'That's a Wrap.' The cast arrive to the studio excited to celebrate what they just created. But they aren't the only ones there. Someone has dressed up as Mistress, the slasher in the film, and has decided to make the art real by staging their own highly stylized kill scenes. One by one, the cast disappear until the true nature of the evening is revealed.