The freshman class at a secret school for dogs includes goofball Corazon, Whiz the shy smartie, Spark the stray, and their new human caretaker, Morgan.
Spark gets into a sticky situation when she makes up a best friend to avoid telling her friends she's a stray, and Morgan endures Charlie's off-the-wall caretaker training.
With classes in session at the same time, Morgan struggles to balance his own school and Pup Academy, much to the frustration of his cooking partner Izzy, who really wants an A.
Corazon hires a look-alike to pretend to be his famous uncle Dude from "Descendants," not realizing that the real Dude is coming to Pup Academy.
Corazon is in big trouble when his mischievous neighbor, baby-pup named Oopsie, follows him to Pup Academy, while Morgan tries to tech-up the school with not-so productive results.
After a rough day, Spark isn't sure she belongs anymore; Morgan is tasked with operating the Wolfehead Middle School hot dog stand without any help.
Morgan agrees to oversee the academy when Charlie and D.O.G. take the day off, not realizing that his classmate Izzy is on a mission to find out where Corazon goes all day.
Exchange student Corazon is sent to the prestigious Kitten Academy, while Spark tries to hide her friendship with the exchange kitten, Zipper.
Morgan and Spark are paired up for a class assignment and end up hopelessly lost in the enormous and intimidating Wildwood forest that surrounds the academy.
When Morgan accidentally sends academy photos to Leon, the school's biggest blabbermouth, the academy is in danger of being revealed to the entire school.
When Morgan gets sick, the pups prepare to prank their new substitute; when Corazon sees who it is, he has a change of heart and must protect the sub from Bite's pranks.
When King calls in a long overdue favor, Spark has to decide whether to help out her fellow strays by giving them access to Pup Academy, or risk the lives of her new friends.
After Spark's expulsion, the school is abandoned, Charlie moves in with Morgan, cats reign supreme, and worst of all, dogs are no longer human's best friends.
Morgan sneaks Spark into his house until he can get her back to Pup Academy; Corazon and Whiz overhear two dogs plotting against Spark.
Spark returns to the academy to discover that everyone is giving her special treatment; Morgan, Izzy and James help Principal Schiffley compete in a talent show.
Morgan, Charlie and the pups are trapped when the school is taken under siege from a very mysterious, and very smelly, force of nature.
Spark enlists her classmates and Morgan to help her get King and the Lost Dogs out of a bad situation; Morgan discovers a long-lost trunk belonging to his father.
Spark goes head to head with Bite in the final Fetchball game of the season as they compete for the title of Most Valuable Pup; Morgan's mom forms an opinion on Spark.
With the school year ending, final exams are the only thing standing before the pups and the next grade; well, exams, and Professor Fitz and Wolf invading the school.
