Cless was a girl with a sad fate. Orphaned at birth and born with a misshapen body, she would've died if the Church of the One God didn't take her in. Shunned by society, she grew to the age of fifteen knowing little love. Now it was time to leave the safe haven of the church behind.

The day of her rite of passage to adulthood arrived. All humans earn Skills granted by the One God when they pray for guidance during the rite. Skills could go from a lowly G-rank to a powerful A-rank. There was a mythical S-rank Skill in the scriptures but nobody ever earned one. Until Cless' turn came, that's it.

The world Cless lives in is a world full of danger. Monsters once prowled the surface and devoured humans. The One God created dungeons to imprison the monsters, but the dungeons are failing, threatening to spill wave upon wave of monsters upon the land.

After becoming an adult and leaving the church she was sexually abused by a vengeful classmate and learned how to fight back using her Skill. Now she is on the fast track to become the world's youngest guild master.

But Cless' heritage was still dormant.