Zayed, Hamad, and Nasser go on their first day of middle school, where they begin to discover the school's system and regulations, in addition to getting to know the principal. The three friends try to be in the same class, as they were before in elementary school.
Zayed is bullied by some of his classmates because of his weight and appearance, so Nasser decides to defend him and get into a fight with them, but Hamad stops him. Instead, the friends start thinking of a smarter way to respond to Mansour and deal with the situation.
Hamad and Zayed are preparing for a math test. Meanwhile, Nasser thinks it is an English test, so he thinks of a way to postpone the exam and heads to the principal's office to try to disable his computer without his knowledge, and indeed the plan succeeds.
Fayez asks Hamad, Nasser, and Zayed to help him find the money that was stolen from him. They cooperate with him and succeed. Later, they discover that Fayez lied and that the money was actually stolen from the spice seller. They decide to set things right and return the money to its owner.
As a delegation from the ministry arrives at the school to review the academic accreditation, the principal warns the students and teachers to prepare. Nasser mistakenly sends the science teacher a file that belongs to him and his friends instead of the presentation file.
Nasser and his friends succeed in presenting a live show on stage instead of playing the presentation when the delegation arrives. Adnan and his friends try to smuggle the camel, but suddenly the ministry delegation and the school principal enter, putting them in an embarrassing situation.
The school league begins between Nasser's class and his friends and another class. Nasser's team is worried because their opponents are adopting a new style of play based on positive energy. However, Nasser's team manages to win.
Nasser, Hamad, and Zayed experience student leadership, in which they take on the position of principal for a day. They face many challenges in making decisions, and by the end of the day they realize how difficult the role is and the importance of the responsibilities that a principal bears.
Nasser wakes up alone in school and tries to leave but all the doors are shut. He experiences difficulties and scary situations that confuse him. Finally, he wakes up in the classroom with his friends around, recognizing that everything he went through was a nightmare.
Nasser decides to participate in the hackathon competition for high school students, even though he is still in middle school, to challenge Khaled. Indeed, he is able to outdo him and hacks into his device.
A new student named Gharib arrives at school. Zayed tries to get close to him, but discovers that he's a bright student who does not settle in one school due to his family's constant relocations. Over time, some of the students begin to feel jealous of him, leading to a fight between them.
The three friends go on a school trip to the Shaib Al Munfaq area, on their own initiative to clean it up and preserve the environment. Upon arrival, they set up tents and embark on adventures in the area.
The trip is hit by heavy rains, and floods block the roads. Ali and Hamad try to collect the tents, but the floods reach the friends, so Hamad suggests that they climb to the top of a tree to take shelter from the floods.
Ali is swept away by the torrential floods, but his friends rescue him. After their escape, a local resident finds them and hosts them until the principal and teachers arrive. Finally, they all reunite and begin the journey home, after an adventure filled with dangers and challenges.
The school principal announces a grand prize for a cultural competition. Hamad and Abdulmalik's team participates, while Zayed and Nasser's team competes against them. Zayed uses information glasses to help him win. Ali challenges everyone and participates alone in the competition.
The friends compete to write a story. Zayed writes a story about the lion attacking their friend Qusay. He is surprised to find that it is the same story as Nasser and Khaled, but with different events and details.
The school principal announces a school radio contest, and Nasser decides to present a new and innovative idea for the school broadcasting. Zayed holds a vote between Nasser and Mansour to decide who will present the radio segment tomorrow. Nasser disagrees with Hamad on the presentation method.
The school cooking festival is held, with all students participating. The principal is surprised to discover a person named Al Madahdar participating, sparking competition among everyone.
The cats gather to mediate between Shirazi and the leader after the conflicts between them over food and control of 30th Street resurface. Meanwhile, Hamad tells Zayed that Nasser is getting into trouble with his friends over video games, and asks them to help him.
The leader decides to devise a plan to take revenge on Shirazi so that he won't be called a coward. Nasser tells his friends about a plan to get back at Al Tamayuz Middle School students who got into a fight with them. He invents a gauntlet that Hamad can wear to defeat all the students at once.