Sabesan’s coffee business grew apace and showed a great profit after Subbu Kutti joined him as a clerk. Subbu Kutti brought something from his house in a small tin and mixed it with the coffee seeds while they were being grounded. Sabesan tried to find out the secret, but Subbu Kutti’s mother had extorted a vow from him that he would not tell no one, not even Sabesan. What was the secret ingredient? Did Sabesan find it out? In this story, writer Rajaji fascinates the readers by his gentle humour and unobtrusive didactic motif.