14-year-old Agathian would often fall sick and not show up at the school for several weeks. When his friends checked on him at his home in Vedaranyam in Nagapattinam district, nearly 500 km away from Chennai, they found that he had been falling prey to insect bites and infections due to defecating in the open. They also found that his father, a daily wage labourer, could not afford a toilet at home. Vaseegaran, Rahul, Naveenraj and Harish - the gang of four friends who study along with Agathian at SK Government High School in Class 8, decided to take the matters in their own hands and build a toilet for their friend.