Cody, Junior, and Joseph not only will stay in Kindergarten forever, but for Summer School. Brooklyn T. Guy didn't finish Kindergarten, so he had to go to Kindergarten too. Alex is still missing, so Brooklyn T. Guy wants Cody to follow Mr. Winkle. Cody went into a warehouse and found Alex, and Brooklyn T. Guy followed Cody and Mr. Winkle, Brooklyn T. Guy tries to arrest Mr. Winkle, but Mr. Winkle is too powerful, but Alex is rescued. Cody, Junior, and Joseph will have to call Jackie Chu's students, aka Penelope and Jeffy. Penelope and Jeffy trys to beat up Principal Steinbeck, but Principal Steinbeck is too powerful, so Penelope and Jeffy will stay at Kindergarten for Summer School. Penelope and Jeffy are angry at Cody, Junior, and Joseph because their summer is ruined. 1st day of Summer School Kindergarten is over. At Jeffy's house, Randy says to Rose that he has a son named Mikey. Mikey is now Jeffy's little brother, and Marvin is suprised. Mikey lives with Rose due to Randy being too harsh. Rose wants Mrs. Fitzpatrick to be nice to Mikey. Marvin finds out that Jeffy is in Kindergarten. And all the other kids tell their parents that they are in Kindergarten. All the parents got angry. Jeffy trained so hard, that he is very strong. on the 2nd day of Kindergarten, Jeffy beat up Mrs. Fitzpatrick, Mikey, Principal Steinbeck, Jackie Chu, and all the other people in School, Cody sue the entire School for 1 trillion dollars. Judge Pooby is the judge as usual. Parents and Brooklyn T. Guy help the kids as lawers. The School lose against Cody, the only way for the School to not pay 1 trillion dollars is to send Cody, Junior, Joseph, Penelope, and Jeffy back to their Jackie Chu classes. And to cancel Summer School for all students. The School did what Judge Pooby says, Cody is sad no Summer School, Junior and Joseph beat up Cody, Jackie Chu classes will return on Augest. Jeffy was originally gonna have summer fun, but Jeffy was so bad at Jackie Chu classes, Jeffy was forced to go to High School forever and for Summer School. Judge Pooby agrees because Judge Pooby is the principal of High School, Jeffy's parents hear about that Jeffy is going to High School, to be continued.