Benjamin 'Beans' Baxter is an agent with The Network.
That organization is an American intelligence gathering organization, along the lines of the far more known CIA. It uses the U.S. Postal Service as a cover for many of its agents which is how Baxter gets involved with it. Baxter is hardly the normal type of individual the Network would want as an operative because he is still a teenager when he is approached to serve.
That introduction comes shortly after the Baxter family, consistent of a father, Ben Baxter, Sr., a mother, Susan Baxter, Ben Jr., and younger brother Scott 'Scooter', moved to the nation's capital from Kansas where 'Beans' was born and raised. Senior was a Postal employee, or at least that is what the family thought.
That changed when 'Beans' sees the postal van his father was driving blown up and he is left thinking his father dead. At least until he is contacted by a man from The Network who explains his father actually worked for that organization and was not really dead, only taken. Now for some reason, The Network needed young Baxter to help recover him.
As we are told at the beginning of each episode by that man, "Beans Baxter may look like your typical teenager but this kid has one of the most dangerous after-school jobs going. I should know; I'm Baxter's boss. The government calls me Number Two. You see, Beans Baxter is a spy; not even his mother or his little brother knows he's working on the side. If they did, it could endanger their lives. His father was one of the Network's top couriers until the notorious terrorist organization, U.G.L.I., headed by the sinister Mr. Sue, kidnapped Baxter. Now it is up to Beans and the Network to find his father and destroy U.G.L.I.'s plans for world domination. And if you think it can't been done, then you don't know Beans!"
That nasty organization mentioned has the full name of "Underground Government Liberation Intergroup" which really describes perfectly (not!) that their mission is to take over the world. The group has its expected number of dastardly henchmen following the orders of its leader, the devious and treacherous Mr. Sue, but it also has a fair number of very snarky, troublesome teenage agents helping it.
In addition to being called away at a moment's notice to help on a mission, finding some excuse to give his mother or brother for his absence, Baxter also has to deal with the infatuation of fellow high school student and 'the most beautiful girl in the school', Cake Lace. Luckily, Baxter is willing to deal with such hardships!