Dylan can bring people back from the dead.
Well, not exactly. She's a Viator, which means she can travel between different time loops. If someone dies in the present, she can go back and save their life in the past. But she can only travel through the loops one hundred times - one there and one back. If she reaches zero, she has to remain in whichever loop she finishes in, a loop which might not be the present.
Mattia is the one that kills them.
As the son of the Chancellor to the King and Johein's finest warrior, he is tasked with executing those that conspire against the crown, commit treason, or travel through time. As Dylan's travelling gift begins to attract the attention of the crown, Mattia is sent with a group of hunters to track down and kill her.
But when unforeseen circumstances are thrust upon them, Dylan and Mattia find an unexpected ally in each other, and perhaps something more. As a relationship blooms and more hunters approach, Dylan's only solace is beyond the mountains with people alike her, or in the arms of the enemy's son.