Debbie has found a sense of normality in her life when her addict son Michael returns home. Before long, Michael's turbulent behaviour begins to re-emerge, affecting each family member. Same Rules Apply follows Debbie's personal experience, as she navigates her complex feelings of unease, mistrust and shame following her son's return. Debbie's partner Chris and their daughter Skye share a close bond with Michael, but also inevitably end up in the crossfire. When Michael returns to old habits, Debbie must make a hard decision.