Everyone has problems with the family. Tomek and Ania finally decide to get married. The wedding - at the request of Ania - will take place in the village, at Tomek's relatives, with whom he has not been in contact for some time. It will turn out that his brothers and mother are like an Italian family - every conversation threatens to explode, and from a great love of fights is sometimes only a step. In addition, mother Ania, who comes to a wedding with a much younger partner, does not agree with the images of Tom's mother about the stable mother-in-law for her son. There will be new problems in the life of wedding guests - Ola and Bogdan, whose marriage will be exposed to a difficult test by fledgling Mikołaj, as well as Zośka, who only had seen the Polish village only on Instagram. But the real spark under the powder keg will be unexpectedly the arrival of a wedding for years of unseen father Tomek. Planeta Singli 3 is a lot of emotions, laughter and surprises in the story that love in different periods of life means completely different things.