After learning that some of his students buy tobacco from a nearby vendor, Mr. Ansari, the principal of Royal Primary School decides to act but is unsure how to respond. Finding a mechanical rule-based approach ineffective, he adopts a hybrid strategy. While complying with formal provisions, he works with stakeholders to develop a three-dimensional response. While he persuades the vendor to stop, a "Healthy Buddies" group works to prevent use and guide users to professional help. The case presents an innovative school-level intervention while raising important questions about public policy implementation, ethics and sustainability of interventions in complex settings.