14 year old Carl Crashman as a joke responds to a spam email by a cloning company and is surprised to find his very own clone mailed to his door 6-8 weeks later. Unfortunately the resemblance of the clone to the original Carl is only skin deep and the clone is eccentric and exuberant, where Carl is a cynic and slacker. Having avoided responsibility his whole life, Carl now finds himself with the awesome responsibility of not only managing the chaos of his teenage life, but trying to keep a lid on the havoc caused by his secret clone.