When invited to a christening, bohemian free-spirit, Arima, finds herself reunited with her past.

As she relies on the kindness of her old friend Sarah and husband Lawrence for a place to stay, Arima discovers an unhappy truth in their marriage and offers to return their kindness by making a life-changing promise.

But can any good come from the promise? Can Sarah and Lawrence trust Arima, and can their marriage remain strong through such a testing time?

A moving and funny contemporary retelling of the story of Abraham, Sarah and Hagar.