Altar Boy and His Sins is a film-performance that reimagines Catholic liturgy from a queer and critical perspective. The projectionist embodies the figure of the altar boy, turning projection into a ritual act of confession. The piece unfolds through three dimensions: the spatial, where the cinema hall becomes a profane temple; the filmic, composed of superimposed analog projections transformed in real time; and the mental, where the repetition of the image and the altar boy’s confessional message generate mental images.