Acting behind their parents' back, Bobo and Jina get on a spaceship and head to Earth. Saber, his daughter Abla, and the rest of the population are shocked when they see the alien spaceship. As Jina leaves Bobo and goes back to his planet, Saber and Abla look after Bobo.
As Bobo eats a lot of food, he gets a stomachache and is rushed to the hospital. Saber's son, a doctor, looks after Bobo. The police decide to let Bobo stay in Saber's house and under his care.
Bobo's parents try to go to Earth to look for their son, but their efforts amount to nothing. Saber throws a party to introduce Bobo to the neighbors and help him befriend the other kids.
As Saber tries to teach Bobo how to treat the children of Earth so as not to alienate him, Bobo causes a fire in Saber's house as he takes his car for a drive behind his back, leading to a lot of problems.
As Bobo's custodian, the police summon Saber to question him about the nine cases that Bobo is implicated in. As Bobo's family arrives from outer space, they fail in locating him.
As Bobo manages to save a child who fell into a well, Bobo's father visits Saber's house to take his son, but the neighbors think that he is Bobo's brother and that he wants to marry Abla. Bobo's father leaves a message for his son, informing him that he will return for him.
When Saber falls ill, Abla asks Bobo to get him some medicine. Bobo dreams about going back to his planet. The police prepare for the arrival of the spaceship again.
When a butcher loses one of his lambs and promises a reward for its retrieval, Bobo and his friends agree to disguise the former as the lamb. As Saber saves Bobo, his son tells him that he must let the police have custody of Bobo until his father comes back.
When a gorilla breaks out and goes into Saber's house, Bobo manages to win its affection and plays with her, even as Saber grows concerned about him. Saber's son receives a message from Bobo's family.
As Ayman takes his friend Bobo to a restaurant behind Saber's back, Saber looks for him. Bobo's parents are shocked when the spaceship goes missing.
As Bobo tries to take honey from a beehive, he causes Saber to be stung by bees, which prompts Saber to tie him up. When Bobo runs away, Saber and his son come up with a plan to deliver Bobo to his parents.
Bobo's mother threatens to leave the planet if her son is not returned. Saber asks his brother Mahmoud to deliver Bobo to his parents, but Mahmoud insists that Bobo's father must sign a document proving that he got his son back.
As Mahmoud tells his friends about how he was assigned to deliver Bobo to his family, his friends make fun of him for sabotaging the mission. Bobo cases his friends to fall into a well. As Saber prepares to return Bobo to his family, Mahmoud sets a trap to capture Bobo's family, which causes them to flee.
When he locks Wael in a closet, Bobo nearly causes Wael to suffocate. Bobo captures a beautiful bird that loses the will to sing after being locked up. Bobo's parents are shocked when the spaceship gets stolen one more time.
When the spaceship comes for Bobo, he is shocked to learn that the alien species, Jessico, has deceived him. As Bobo returns with Saber, he removes a warning sign that warns about a hole, causing Saber to fall into it. Bobo's family releases a gas that induces laughing fits on Earth.
Saber grows upset with his brother Mahmoud for selling spoiled meat. In a dream, Saber imagines that he gave Bobo back to his family and befriended them after getting on the spaceship.
When scientists arrive at Saber's house to see the spaceship, he grows upset with them. Bobo's parents arrive and meet Saber, only to discover that Bobo went out without telling Saber. Bobo's parents are forced to leave when Officer Bassel arrives with the police.
Bobo falls into the well after he schemed to push his friends into it. After Bobo's parents come to take him back, Bobo gets them to agree to let him stay with Saber till the end of his vacation.
As Bobo, Saber, and the neighborhood's people come together to clean the streets, a resident from the planet Sisco tries to deceive Mahmoud into releasing laughing gas. Mahmoud reports the incident to the police, which makes him a hero in the eyes of his peers.
The residents of Sisco try to use Bobo's desire to fly like Superman to convince him to throw himself off a building to get rid of him, but his friends call the police and save him. Saber throws a farewell party for Bobo and returns him to his family.