She remembers every time they've met. He remembers none of them. She is immortal, as long as she does not interfere. He is human, and without knowing it, he is changing everything. One meeting altered their destinies forever. She has spent lifetimes turning back time to save him, losing pieces of her immortality each time she fails, becoming more human with every loss. Every version of his story ends the same way. Him dead. This is her last chance. To save him, she may have to attempt the one thing she has never tried before: let him go. Because loving him might be the very thing that kills him.