The land between the Rhine, Danube and Alps is ancient Celtic land. 2,300 years ago, the shepherd Ekuos comes down from the mountains into the valley with his sheep. A chosen one who possesses the "second sight". He has seen celestial images that he cannot interpret. Ekuos wants to tell the wise men about the phenomena in the firmament, but his brother's fate forces him to embark on a long journey, at the end of which the ancient prophecy of the collapse of the sky is to come true in a terrible way...