What kind of dog gets an "F" in obedience training and then saves a museum, catches a burglar and "hatches" an emperor penguin? Only Emily's loveable and rambunctious Great Dane puppy, Pinkerton!

Pinkerton's boisterous behavior in Emily's classroom lands him in obedience training at Dr. Alesha Kibble's Canine University. After tearing up a newspaper when told to "fetch" and affectionately licking the invader when told to "get the burglar," Pinkerton receives an "F."

Undaunted, Pinkerton sneaks into the museum where Emily's class is hearing a lecture about emperor penguins. Impressed with penguins and their devotion to egg and family, Pinkerton dreams of being a penguin parent. Sneaking out of the house, Pinkerton finds a football at the park and tries to hatch it at the ice skating rink. He's discovered there by Emily and her family, and Emily's grandmother delivers a stuffed egg with a baby "Pinkwin" inside for Pinkerton to care for.

Later, Pinkerton is teething and destroys a neighbor's tree, causes a piano to collapse and devours an entire box of rawhide bones. Emily realizes that she can't leave Pinkerton at home and disguises him in a stegosaurus costume to take him with her to the museum's Dinosaur Day. When a huge dinosaur skeleton is revealed, Pinkerton grabs a bone from it, causing the entire skeleton is revealed, Pinkertongrabs a bone from it, causing the entire skeleton to collapse.

As Emily prepares to make up for Pinkerton's mistake, everyone notices the precious Pepperwill diamond is missing! And there's the burglar! Pinkerton springs into action at Emily's command to "Fetch!" throwing the burglar to the ground and sitting on top of him. The day is saved as all celebrate Pinkerton!