This is the promise that Jack makes to Esha at the end of their precious week together in London. Esha has to return to India for her wedding to Dev, which has been arranged by her wealthy parents. Aware of her cultural commitments and knowing in her heart that they cannot have a future together, their separation is marked with a single promise. The turbulent years that follow are recorded in Esha’s journal, in the form of letters to Jack, which eventually find their way into his hands and which rock his world to the core. The rigid traditions and formalities of the social world of Amritsar, in which Esha is trapped, and to which Jack has no access, may well stretch their scarlet thread to breaking point. Can a single promise made seven years ago bring together two star crossed lovers in this gripping tale, spanning two cities?