The Line of Fire

Alicia is a "fire hazard."
Sin is a "psychopath."
Neither is human.
Everyone says that having a mate is the best thing fate can give you. However, neither Alicia nor Sin wants one. Whether they would feel weakened by one or don't want to burden one is undecided. However, when the two meet and discover the secrets behind the others isolation, will something change for them or will the bring destruction to each other and the world?