Even at the beginning of training, each wizard chooses the element with which he will forever connect his life. Burn opponents with the power of flame or turn to light to heal mortal wounds? However, Decimus did not choose his path in his final year of study. This has never happened before, and the university leadership convenes a council to decide the fate of the young phenomenon. At the same time, an undead knight appears from the other world who has the answer to this question. But to get it, Decimus is forced to take part in an impossible mission to prevent inter-world conflict.