Middle of the night

On 15 July 1994, ten-year-old Ethan and his best friend Billy fell asleep in a tent on a manicured lawn in a quiet New Jersey cul-de-sac. But in the morning, Ethan woke up alone - the tent had been sliced open with a knife, and Billy was gone. Never to be seen again. Thirty years later, Ethan has returned to his childhood home, still desperate for answers. Who took Billy?