Evil Redemption

Niall is a Dark Angel. He has killed when it has suited him and will do it for fun even.
Louis is a Light Angel. He has to protect the Humans from the Dark Angels.
Zayn is a Oracle. He is neither a Dark nor Light Angel. He can see into the past and future.
The problem: Zayn, Louis and Niall are Soul Mates. To hurt one of them, you will hurt all of them because they are linked by an unbreakable Bond.
Lucifer (a.k.a Bobby), Niall's father, has sent Niall to kill Zayn. Mark, Louis' father, has sent Louis to protect Zayn from Niall. When Niall and Louis meet again, they are shocked at the pull towards each other. Add Zayn to the equation and you get a problem.
Niall accepts Zayn and so does Louis, but the Angels keep their distance from one another unless it is necessary. Like when Lucifer sends out Harry and Liam, two of Niall's friends, to kill Zayn, Louis and Niall.
Louis and Niall put aside their differences and protect Zayn at all costs. Will it be enough to stop Niall's father from getting what he wants?

Cover by @-mullingaar