The Assassin in the shadows

Vivienne Fall doesn't have the life of every normal human 17 year old, abused from a young age Vivienne runs away from home only to stumble upon a pack of wolves who are also trained assassins who's aim of the game is to rid the world of the one and only wolf god.
Ivan Azarala is known as the feared ruthless wolf god, left to suffer alone for 500 years he built a stone tomb around his heart. what is he to do when his mate not only the key but also the enemy hell bent on killing him.
loyalties are put to the test, hearts are broken and ties are severed.
will these two overcome it all and be able to come face to face with the real enemy. or will they let their worlds crumble at their feet.