The Promise (2017) Mackenzie Miller is a beautiful and successful young woman who is searching for Mr. Right. She is also trying to keep a promise that she made to her dying grandmother. That promise was that she would always 'be there' to look after her aging grandfather, and never place him in a nursing home. She also promised Grandma Violet that she would never date a man that Grandpa did not approve of. And how can he approve or disapprove if he doesn't get to meet Mackenzie's suitors? While Mackenzie is searching for true love, Grandpa George has plans of his own in this family friendly romantic comedy.