Restauranteur Paddy Swann was the life of the party until the day a man pushed him in the path of an oncoming train, leaving his twenty-something daughter Ash and wife Nina devastated. Shortly after Paddy's funeral, the two women receive a surprise in the mail: a note and package from Nick Radcliffe, an old friend of Paddy's, and a nondescript lighter that once belonged to him decades ago. This unexpected gift draws Nick and Nina closer together--much to Ash's dismay.

Martha is a small-town florist with dreams of expansion. She lives with her second husband Al, her baby, and two sons from her prior marriage. But they never seem to have any money, and with his constant traveling for work, she feels like a single parent--especially when an emergency makes her realize something needs to change.

But Nick and Al may not be who they say they are, leading these three women on a shocking collision course, wishing they had heeded a warning: Don't let him in.