The first installment of the series, Taboo I, introduced audiences to the Parsons family, consisting of parents (played by Mark Hammer and Ellen Siano) and their two sons, Jim (played by Evan Williams) and John (played by Duncan Harris). The film revolves around the themes of incest, pedophilia, and the blurring of familial boundaries. The narrative takes a dark turn as the family's repressed desires and secrets are slowly uncovered, leading to a tragic confrontation with the consequences of their actions.