Anna loves Girls' Night with her friends. With the kids safely in bed, it's a chance for the women to let loose, enjoy some wine, and just laugh. But after one lively evening, Anna doesn't arrive for school drop-off the next morning--or the next, or the next. Everyone, especially her husband and young son, are frantic with worry but none more so than Grace, her childhood best friend. Grace is certain that someone is hiding the truth about Anna's unexplained disappearance. As rumors fly and accusations are whispered among neighbors, Grace decides to take matters into her own hands and find out what happened to Anna... or die trying.