KIX is a 12-year odyssey following Sanyi's journey from a rowdy street kid in Budapest to a disillusioned young adult. Fueled by an unlikely friendship with filmmakers Dávid and Bálint, the film captures the evolution of Sanyi's life, which is marked by family struggles, school issues, and the weight of surrogate fatherhood to his newborn sister. As Sanyi faces the challenges of adolescence, the filmmakers shift from active participants to observers in his tumultuous life; these culminate in a tragic turn of events forcing him to confront the responsibilities of adulthood.