The third season of the Ühikarotid starts with a big bang: Tibu gets an electric shock. In addition to his other phobias, this adds an electric phobia. But how would someone find work as an electrician with an electric phobia? Therefore, Tibu decides to leave the electrician course and switch to the girls' course, becoming a cook. The dormitory caretaker Salme gains an admirer. Love works wonders.

Tibu has electrophobia, and he also fears that he might have burnt his tool with an electric shock. Fortunately, it turns out to be a false alarm. Marion has a fear of men, and one man receives a letter of rejection from her. Iris thinks Tibu has a fear of relationships. We find out that Salme is afraid of spiders. However, Iris believes that a spider brings luck and that love will probably come to Salme. Iris is not mistaken.

Tibu and Virgo have made a bet on women, and the loser has to kiss the dormitory caretaker. However, Virgo needs to kiss Tibu to win the bet. Tibu doesn't realize that he loses either way, and to top it off, he gets caught kissing Virgo by Iris. The boys and Vika get caught in a compromising situation at the STD clinic. Tibu decides to switch to the girls' course, becoming a cook instead of an electrician.

Iiris finally breaks Tibu's secret with Cosmo's help - everything points to Tibu being gay. At the same time, the boys have arranged for a dancer for Tibu's birthday. With limited options, the dancer turns out to be dorm-Leena, from whom Tibu got the STD. Tibu's parents also attend the spicy party. Staff gets a new "legal" job offer, and Andri's father offers him a job as well. However, the boys must decide between money or friends, as the girls urgently need the boys' help. Namely, the new guys in the dormitory make an unwelcome visit to the girls' room, and things get out of hand.

Male chefs are more highly valued, and Tibu, who has just started cooking courses, is offered a job. He also invites the boys to work as waiters. Due to confusing circumstances, instead of waiter jobs, the boys end up having to strip in front of the public. However, they are refused payment for their clumsy strip, so the boys take their wages out in food since their stomachs are empty anyway.

Four dorm heroes and a baby it goes without saying who puts whose strength and skills to the test. After a long and exhausting struggle, Andri, Kustav, Tibu, and Virgo finally manage to conquer the baby. While watching over the sleeping baby, the boys find their softer side and believe that they will all become great fathers.

The dormitory caretaker Salme is in a romantic mood. She has said "yes" to her suitor, checked the info line to confirm there is no upper age limit for marriage, and has decided to make her dream of a white dress come true. Vika, Iiris, and Marion are giving advice on the bridal gown.

The dormitory caretaker and her suitor's wedding is in jeopardy. Marion breaks Virgo's heart. Andri's parents are divorcing. Staff and his brother are still on the run. The boys face expulsion from the worst school in Estonia. The dormitory caretaker is appointed as the guys' watchdog, and they have to clean the dormitory.

The boys face expulsion from school. They tie their ties neatly, straighten their collars, and embody first-rate sycophants.

Iiris falls under the influence of the manipulative Kätlin, Virgo and Tibu save the dormitory, and Andri sees the shadow side of his idealized father.

Ühikarotid have embedded themselves deep into the hearts of viewers over three school years. Why do we love them? Because everything always turns out like usual for them, even though they usually aim for the best. However, not everything is quite over - something can always go wrong again.