Will Ferrell stars as Brad Taggart, a mild-mannered everyman whose only goal in life is to be a good stepdad to the two kids of his wife Sarah (Linda Cardellini). Just when he thinks he's finally won them over, Sarah's supercool ex-husband and the biological father of her children, Dusty Mayron (Mark Wahlberg), comes back into the picture, determined to usurp Brad's standing as the favorite dad. These two polar opposites soon get caught up in a competition to win the hearts of the family they both love, but their rivalry quickly escalates out of control. Directed by Sean Anders. Thomas Haden Church, Scarlett Estevez, and Owen Vaccaro co-star.