Bob Ho is an undercover CIA super spy who decides to give up his career in espionage to settle down with his next-door neighbor and girlfriend, Gillian. But, Bob has one more mission to complete before Gillian agrees to marry him: winning over her three opinionated kids. When Gillian suddenly has to leave town, Bob volunteers to baby sit the children so he can earn their approval. But, when one of the kids mistakenly downloads a top-secret formula from his computer, Bob's archenemy, a Russian terrorist, moves in for the attack, forcing Bob to juggle the roles of spy and prospective stepfather in the most challenging mission of his career!