A seven-year-old boy (voice of Miles Christopher Bakshi) has his life turned upside down by his new brother, an infant known as the Boss Baby (Alec Baldwin) who wears a suit and has the brusque manner of a businessman. However, the two are forced to get past their initial antagonism when they must work together on a mission of espionage involving the rivalry between babies and puppies. Steve Buscemi, Lisa Kudrow, Jimmy Kimmel, and Tobey Maguire also lend their voices to this animated comedy, which is based on a picture book by Marla Frazee.