An energist barrier, known simply as the Veil, has separated the nations of Solia and Nilia for long generations. But stories persist on either side of the immense silvery curtain, recounting the legends of the ancient guardians, powerful creatures summoned by the guardian callers to aid mankind. To many, the guardians are nothing more than myth-until the day the Veil is pierced, unleashing a horrific evil from a previous age and starting a two-front war. The burden of setting the world of Nil'eon aright falls on the shoulders of a young Solian man named Esk, a guardian caller. When dire circumstances force Esk to enlist the help of Kith, a Nilian young woman and a near stranger, to summon a guardian, they must stumble through struggles from within and without, as countries, peoples, families, and hearts clash around them. What will it take for them to set aside their mistrust and differences in time to halt the destruction?