Set many years after the first film, the Templeton brothers Tim and Ted have grown up and become estranged. Tim is married with children, and Ted is the CEO of a hedge fund. The two will be reunited by a new "Boss Baby" with advanced methods and a positive attitude to inspire a new family business. Tim lives in the suburbs with his wife Carol, known as "Super Mom", and his extremely smart 7-year-old daughter Tabitha and super cute newborn baby Tina. Tabitha is a top student at a prestigious educational institution. She idolizes her uncle Ted and wants to be like him, but Tim is worried that she is working too hard and will not have a normal childhood. When Tina's true identity as a top-secret agent of the Baby Group is revealed, her purpose is to uncover the dark secrets behind Tabitha's school and its mysterious founder Dr. Armstrong, the Templeton brothers will be reunited in an unexpected way, and the two will re-examine the meaning of family and understand what is most important.