One Hell of a Pact (Sebastian Michaelis version)

Layla doesn't put much price on her own life, but when it comes to her sisters she would do anything, even giving up on her soul. Because of their tragic past, they got separated and her only goal in life is to find them and to grant their safety. Being the troublemaker that she is, Layla almost ends up dead, but for some reason, a certain demon cross paths with her and she gets herself a deal with the devil. She'll know a world full of cruelty, betrayal, and violence, but her only choice is to become like that too in order to succeed. But not anything happens according to the plan, so she'll face many obstacles, twisted feelings, supernatural beings and a lot of blood will stain her hands and soul.