Twelve-year-old Peter Morton discovers a mysterious gremlin named Nix hiding in his attic, a clever and mischievous creature from a hidden world of shadows and secrets. As Peter learns of Nix’s past and the dangers that stalk them, he must navigate a world of dark creatures, ancient charms, and clever traps. Together, boy and gremlin face relentless shadows, forging a bond of trust, courage, and survival, uncovering a hidden legacy that will change their lives forever.