It is a tragic poem about ordinary people facing a given tragedy, using their mortal bodies to fight against the fate of gods.
The original Spell Return builds a cruel world - good people will die, heroes will lose, and good intentions often lead to destruction. The protagonist of this work, Mu Feng, came through time with hatred and unwillingness for this "world full of tragedy".
He is not the strongest spellcaster, he does not have Gojo Satoru's unlimited spells, he does not have Otoko Yuta's Curse Queen, and even his initial spell power is E-level given by the system. The only thing he has is a strong resistance to "tragedy" and a [Reversal of Fate System] that does not allow him to directly spoil or erase the tragedy out of thin air.