Plot Summary: Tim (Marsden) is now a married dad. Ted is a hedge fund CEO. But a new boss baby with a cutting-edge approach and a can-do attitude is about to bring them together again … and inspire a new family business. Tim and his super-mom wife Carol (Longoria) live in the suburbs with their super-smart 7-year-old daughter Tabitha (Greenblatt), and super-cute new infant Tina (Sedaris). Tabitha, who’s at the top her class at the prestigious Acorn Center for Advanced Childhood, idolizes her Uncle Ted and wants to become like him, but Tim worries that she’s working too hard and is missing out on a normal childhood. When baby Tina reveals that she’s—ta-da!—a top secret agent for BabyCorp on a mission to uncover the dark secrets behind Tabitha’s school and its mysterious founder, Dr. Armstrong (Goldblum), it will reunite the Templeton brothers in unexpected ways, lead them to re-evaluate the meaning of family and discover what truly matters.