Sam Daly is leading a life of quiet isolation following the death of her husband, Mike. She is content to merely put in her eight hours at work each day before heading home to lose herself in a book, only to restart that cycle the following morning. But Sam's self-imposed cocoon is threatened after her eccentric father-in-law Harold stumbles back into her world to announce that he is getting remarried to the mysterious Marcie Porter, who is burdened by her own complex family history.

The last thing Sam wants is to get involved with Harold's new endeavor. But after getting wind that Marcie's four children intend to sabotage the wedding, Sam is reluctantly drawn into a new family drama and all that comes with it, whether it be the development of unexpected alliances or butting heads with ruthless enemies. While navigating these landmines, Sam finds herself struggling to come to terms with the painful past she had been holding away at arm's length for so long.

Through these trials and tribulations, Sam is also forced to confront the one question that she had sought to avoid since her husband's passing—whether she is done with the notion of "family" after all.