Alvin learns the true meaning of Christmas.

The plot chronicles the exploits of Michael, a teenager who is using marijuana and stealing his father's beer. His younger sister, Corey, is worried about him because he started acting differently. When her piggy bank goes missing, her cartoon tie-in toys come to life to help her find it. After discovering it in Michael's room along with his stash of drugs, the various cartoon characters proceed to work together and take him on a fantasy journey to teach him the risks and consequences a life of drug-use can bring and save the world.

The Chipmunks work in an amusement park attraction. After Alvin drives a crazy tour group, they miss their next performance and are locked in the park after closing time. Little do they know that the real Dr. Frankenstein has been hired in a new attraction called, "Frankenstein's Castle"; figuring that the castle isn't scary enough, the mad scientist recreates the real Monster.

“花栗鼠和花栗鼠女孩在一场热气球比赛中正面对决，胜者将获得1万美元。参赛者们并不知情，这场‘比赛’实际上是一个钻石走私团伙！”