The Boss Baby and the other infants catch Tim with the recording and after a chase scene throughout the backyard and the house, the tape is terminated after The Boss Baby threatens to tear up Tim's favorite stuffed animal, Lam-Lam. Boss Baby tries to cover his evidence of doing a real meeting, so his team and him both act like normal babies while in the act of saying how it’s humiliating. After a while, the triplets give Lindsey a warning that their parents are coming, the screen then shows multiples of parents busting through the hall and mistaken them for having a fake meeting, then they aw because it’s cute to them.

Seeing an opportunity to be rid of him, Tim decides to record a conversation between him and other toddlers who are over at Tim's house for a meeting to do something about how puppies are receiving more love than babies. Soon, Tim learns that the baby can talk like an adult and he introduces himself as 'The Boss'.

Tim is envious of the attention the baby is receiving, not to mention suspicious when the infant acts odd around him, but his parents, being blind to the baby's eccentric behavior, try to convince him that they will grow to love each other. One day, Tim is surprised when a business suit-wearing infant shows up in a taxi at his house, and Ted and Janice proudly call him Tim's little brother. While sleeping Tim begins to wonder where babies come from. After he goes to sleep, we see that Janice is pregnant. While tucking Tim in bed one night his parents ask if he wanted a baby brother Tim declines the offer, saying that he is enough. A man named Tim Templeton tells a story through his imaginative point of view as his 7-year-old self who lives his days having fun with his parents, Ted and Janice, in the late 1970's and wishes it to be just the three of them forever.

What is the first boss baby movie