SET IN LAGOS, A Letter To My Mathematics Teacher is a story of corruption and indiscipline amongst teachers of a local secondary school. When boundaries are crossed and tensions boil over, the ex-students stage a protest which leads to the temporary closure of the school. Mr Adedoyin, the new principal decides to investigate. His attention is drawn to a suggestion box mounted on the wall outside his office. What he uncovers is shocking. He calls for an emergency meeting.