Finn is 10 years old when he finds a carved wooden pillbox among his mother's belongings. When he touches the worn wood he experiences a cross between deja vu and putting his hand too close to a candle. Unable to get an explanation from his mother, he hides the box in his desk drawer.
Immediately, Finn’s life begins to change. He dreams every night of a woman trapped in a grove of aspens. When he’s awake he experiences visions. Sometimes he sees a tangled jungle and smells ginger. Other times its cobbled streets and horse-drawn carriages. He can’t shake the feeling that these scenes are somehow his own memories.
As Finn struggles to understand the relationship between the box, his nightly dream, and his visions, strange forces gather around him. Every few months a man with a greasy ponytail appears in the night and circles Finn's apartment, sniffing the air and examining the walls.
When a young British tutor arrives and offers to help fill in some of the blanks, Finn’s world turns upside down. Although Mr. Stellar appears (almost) ordinary on the surface, he proves capable of driving away the man with the ponytail. He also gives Finn a magical board-game. Playing the game starts Finn down the path to solving the mysteries of the pillbox. As Finn learns what is truly at stake he will have to make a choice: try to live an ordinary life, or abandon his mother and attempt to free the woman in the grove?
Meanwhile, the man with the ponytail is searching, and he’s not planning a rescue mission. He wants to find the grove to exact revenge for something Finn did centuries ago in Puerto Rico - something the boy will have to come to terms with before he can consider himself the good guy.