ERRAIAKThe scream that comes from the caves. He who listens, feels and sings. A language without words. The one that comes out from the bowels. The echo of our ancestors.But since when is the irrintzi among us? Does it still exist in the 21st century? These and many other questions are what the documentary Erraiak tries to clarify. Exploring various corners of Euskal Herria we have tried to clarify the origin and expansion of irrintzi. What influence does the irrintzi have on the activity of sailors?