When semi-retired Irish nun Sister Agatha Murphy meets Avtar Mehta round the back of his historic Delhi hotel, they form an instant bond over a sneaky smoke and good gossip. Then a street robbery outside the hotel, a dead body inside it, and the disappearance of a pilgrim guest bring the local police to the hotel, determined to close their cases quickly, and with them the Delhi Haveli Hotel.

Sister Agatha and Avtar must race to stay one step ahead of the police, the Indian secret service and a hidden killer – as well as keeping their sense of humour through a terrorism scare in the run up to Christmas on the colourful streets of old Delhi.