One day, the little blackfish, who lives in a brook with his mother, wonders about the world outside his hometown and goes on a long journey by resisting those who want to prevent him. On this journey, he embarks on adventures with frogs, seahorses, crabs, snails and a big-dipped heron. The purpose of the little catfish is to get out of its own world and to know other worlds, to discover other lives and to learn that life is not just the stream in which it lives.

A little fish curious to see the world. While the play, in which his journey to freedom is told, deals with concepts such as justice, equality, self-confidence, and courage with a childlike perspective, it is also an example of happy people who do not accept the life offered to them and are not afraid to realize their dreams, who risk many things for more.