Following the appearance of a bizarre phenomenon called “ball lighting” brother and sister, Andre and Ben, are stunned to find a strange, human-like girl cowering in their backyard shed. While wary, the millennials are thrilled by what appears to be a mythical being. They welcome her into their home where she tells them her name is “Shae” and warns them of a dangerous monster that has followed her from “Elsewhere.”

Shae is a delicate being with wings and a beautiful voice. She has the talent to draw creatures to her, particularly birds, butterflies, and bats. She’s also desperate to return to a world she can now scarcely recall. Exquisite and beguiling, Shae evokes a protectiveness on their part—especially when she grants them gifts of extraordinary new talent. Andre and Ben want to help her however they can.

But gradually Andre and Ben discover these gifts carry ghastly side effects. Andre is enchanted by prophetic dreams but they wither her grip on reality. Ben creates sublime music but his health deteriorates.

To their horror, they discover that Shae must complete a terrible task before she can return home. Everyone they know and love is in danger. The siblings must now decide how to thwart a being they’ve grown to care for.

What they don’t realize, is that to her own bewilderment, Shae is changing—she’s beginning to develop a conscience, and an affinity for her human hosts. And as her time runs out, she must make a terrible choice before all their lives spiral into a grisly climax of cruel irony and heartbreaking sacrifice.