Mirana Pinal knows she's different. In her homeland of Kinderra, only a small minority of people are born with one of three magical powers—Seeing, Defending, or Healing. Mirana, however, was born with all three, making her a rare "Trine," one whose powers can bring peace to the war-ravaged land—or destroy it. Only two other known Trines exist in the current age: Tetric Garis, a hero to Mirana's people, and the Dark Trine, the ruthless leader of an enemy regime, who is determined to rule Kinderra under the guise of bringing peace. Mirana is torn between her duty to use her powers and a dark secret—visions of her destroying her homeland. Only her boyfriend Teague, a brilliant herbsman who yearns for powers of his own, knows the heavy burden she bears. She keeps her powers a secret, but fate has other plans.
When Mirana receives terrifying premonitions of an enemy attack, she is forced to reveal to the Kinderrans that she is a Trine to warn them of the impending assault. What she doesn't tell them is that in the same visions, she watches herself unleash unspeakable powers of destruction, crystallized in the image of a watchtower exploding with light. Trine Tetric Garis takes her under his wing and begins teaching her to use her powers safely, but Mirana still fears she will cause more peril than forestall it. As the battle draws near, Mirana must search within to discover the true nature of her powers and summon the courage to determine her fate.