Gansey spent many years searching for the lost Welsh king. One by one, he dragged his friends into this quest. Ronan, who could bring objects out of dreams. Adam, whose life was no longer his. Noah, whose life could not even be called a life. And Blue, the girl who loved Gansey with all her heart, but who was destined... to kill him. Now that the search has come to an end, and dreams and nightmares have united against them, the friends will have to decide on the most terrible step of their lives.