Len Pandora is an alchemist in training with astounding theoretical knowledge but none about mana. As he begins to learn though he realizes that he posses a skill, an innate ability that can neither be learned nor copied by anyone else.
Len used his skill to advance at a rapid pace but it is not enough of from him. Len had an unspoken past and burning desire for revenge but to fulfill it he needs strength beyond his own imagination.