For centuries, the Kingdom of Aurora has lived beneath an impenetrable Dome, protected from the creatures that attack it day after day.

Seventeen-year-old Art Hammer, a young Striker in the Aurora Force, has always wondered what lies beyond it.

Everything changes when Art and his childhood friend Diana discover Lisa—a young elf hidden inside Aurora.

Elves come from beyond the Dome. Lisa shouldn't be there.

With no memory of how she crossed an impenetrable barrier, she carries only one mysterious clue: “Seventh Artifact.”

Her impossible presence leads Art, Diana, and Lisa toward the mystery of the Seven Artifacts—and secrets that could unravel everything they thought they knew about the Dome.