Snoopy embarks upon his greatest mission as he and his team take to the skies to pursue their arch-nemesis, while his best pal Charlie Brown begins his own epic quest back home to win the love of his life. Charlie Brown, Snoopy, and the whole gang are back in a heartwarming story. A new girl with red hair moves in across the street, and Charlie Brown falls in love. Now he tries to impress the red haired girl to make her feel like he's a winner, but Charlie Brown just can't do anything right. At the same time, Snoopy is writing a love story about his continuing battles with The Red Baron. Then Charlie Brown has accomplished something never done before. He gets a perfect score on his standardized test, but there has been a mistake. Should he tell the truth and risk losing all of his newfound popularity? Can Charlie Brown get the girl to love him or will he go back to being a nothing?

Manny, Diego, and Sid embark upon another adventure after their continent is set adrift. Using an iceberg as a ship, they encounter sea creatures and battle pirates as they explore a new world. When Scrat accidentally provokes a continental cataclysm with a storm, Manny is separated from Ellie and Peaches on an iceberg with Diego, Sid and Granny but he promises that he will find a way to return home. While crossing the ocean, they are captured by the cruel pirate Captain Gutt and his crew. However they escape and Manny plots a plan to steal Captain Gutt's ship and return to his homeland in a dangerous voyage through the sea. But the cruel pirates seek revenge against Manny and his family and friends.

Horton the Elephant struggles to protect a microscopic community from his neighbors who refuse to believe it exists. One day, Horton the elephant hears a cry from help coming from a speck of dust. Even though he can't see anyone on the speck, he decides to help it. As it turns out, the speck of dust is home to the Whos, who live in their city of Whoville. Horton agrees to help protect the Whos and their home, but this gives him nothing but torment from his neighbors, who refuse to believe that anything could survive on the speck. Still, Horton stands by the motto that, "After all, a person is a person, no matter how small."