A story of an extraordinary TreFlik Family and their seemingly average life. A 4-year-old Treflik and his 6-year-old sister Treflinka live together with their parents in a little house. One day their ordinary life changes due to the appearance of a mysterious newcomer from a far away universe - Little Uncle. He has many magical powers and remains invisible to everyone except the children. During each episode this new friend takes Treflik and Treflinka on a new adventure visiting distant, desert lands, teaching them how to fly in a magical forest and conjuring mysterious objects. At the same time he helps children familiarize with important values and ideas, such us friendship, respect, support, honesty or tolerance. Laughter, fun and lots of positive feelings are also brought to little Trefliks by their family and friends, among whom there are some very intriguing characters!—Momakin

In every episode, singing and dancing Trefliks take children on a new adventure into the world of imagination. This seemingly ordinary family live in a small house. One day a mysterious guest - Little Uncle - pays them a visit. He has magical powers and is invisible to adults. Since then, he accompanies children - 4-year old Treflik and 6-year old Treflinka in their daily activities. He also secretly supports Mum and Dad. He takes the characters to mysterious faraway lands and helps them to understand the world around them. The Treflik Family is often visited by their relatives and friends, a group of very intriguing figures. This includes Grandma, Granddad, Auntie, Mr Jareczek, their neighbour Mr Robobot and finally the King and the Queen. The series is full of positive energy and teaches children values such as friendship, respect, honesty and tolerance.