 The year 2500. People move by beam or by mini-jet, sleep is no longer necessary, the moon is an artificial sun so the temperature is under control and there are no more nights. People live for 300 years and more. The world is ruled by  Raad der Wijzen , the council of the wise. In this time lives Peter Bergen, an archeologist. He discovers with his friend An Bal the tomb of Malegijs, a magician from the 13th century. In that tomb they find the Stone of Wisdom. An s brother is a cybernetic who has made a time machine, against the will of the Council. Peter travels with the time capsule to the middle ages and saves there Isolde. Together they travel through the time but due to a time block they can go no further the Antwerp in the 1960 s. At the end, everything turns out well and Isolde comes to live with Peter to live in the 26th century.