His Wolf's Luna

On one hand was Marcus, a very strong, powerful and vile Alpha who could do whatever he wanted an on the other hand was Kayla, the heir to the throne of the Wildlife pack. Alpha Marcus would not hesitate to take any life to get what he wants. Alpha Marcus for reasons not revealed decided to take Kayla as his bride but what happens when her sister, Violet comes into the picture and try to save her from this vile monster?