Chennai, November 2019. The rains have started, and the Cauvery Heart and Transplant Institute has just saved another life. Dr Thenmozhi Pazhani is the anaesthetist who keeps other people's hearts steady. Eleven years in the theatre. A father recovering from a stroke. A mentor who taught her that a signature on a consent form is a promise. When a young flower seller's son is declared brain-dead after a road accident, she does everything by the book. Days later her mentor is found dead in his own garden, and the book begins to look like something else. A mother who will not stop asking one question. A nurse with a tube of blood and nowhere safe to keep it. A police inspector who has never once been thanked. A Chairman who gives away medals every year, and is applauded for it. Fifteen families said yes. Somebody has to say no.