When Aria turned five her grandmother told her that their family has never been blessed with a mate and not having a mate doesn't mean they won't find love.
When Aria turned eighteen, her desire to have a mate became stronger because her best friend whom she had a crush on found his mate and the pure joy in his eyes when he told her about the mate bond, place a emptiness in her heart.
"You are special, Aria. You have the power to turn back time."
That was what her grandmother told her when she claimed she was cursed and even though she was not satisfied with that answer, she never asked again.
Two years later, Aria got a call from the hospital and found out that her grandmother has been poisoned and the only way for her to save her grandmother was to accept this deal made by the Alpha of the Shadow Moon pack 
"Marry Alpha Tristan, have him fall for you and then kill him."
It was the only way to saved her grandmother so she agreed despite knowing that she was walking into a lion den, because how was she going to kill a man who despite losing both his sight and his mate, command enough power and authority to still be called a Alpha.
How will Aria feel when she realized that the man she has been task to kill has been waiting for her for five lifetimes and have just two years left to live?
What situation will Aria find herself that will require her to turn back time and what price will she pay for altering time itself?
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Excerpt 
Aria felt uneasy by his silence and wondered if it was the right moment to use the techniques, Hailey has taught her.
Taking a deep breath, Aria stepped closer and closed her eyes as she brushed her lips against Tristan's.
Tristan stiffened when he felt her lips on his and without thinking, he immediately pushed her away.
Seeing the angry look on his face, Aria felt like it was all over; she was definitely going to be killed now. 
But Tristan expression was shadowed by more than anger. How had she gotten so close without him sensing her? And why--why was his heart racing like this?

Aria woke up to an empty bed, and she was about to go searching for Tristan when the door opened, and he came in with a glass of milk.


"Did you sleep well?" Tristan asked as he handed her the milk.


Aria nodded, bringing the glass to her lips; she took a sip from it and then frowned. "Why does it taste so bitter?"


Tristan froze for a moment and then chuckled, "It's because I added something to it."


"A supplement for you to regain your strength." Tristan felt heartache as Aria easily believed him. He watched as Aria emptied the contents, knowing fully well that the only reason she drank it was because he made it.


Aria grimaced as the bitterness hit her throat, and she was about to complain when Tristan kissed her.


The kiss was slow and gentle, as if rewarding her for finishing her milk, and after a while, he pulled away, saying, "I have some things to take care of, but as usual, if you need anything, call me."


Chapter 80 - Marking.