Amid the sun-drenched orange groves of California, childhood friends Tuck Mattice and Emily Swanson shared a bond that seemed unbreakable—until life ripped them apart. Thirteen years later, Emily is a rising pop sensation in need of security, and Tuck, a brooding ex-con, is in need of a fresh start. When fate brings them together once again, Emily hires him on as her new bodyguard. They butt heads and bicker, just like the old days—yet neither can deny the heat rekindling between them.

But when a cataclysmic solar flare disrupts the electrical grid, society is suddenly plunged into chaos and darkness. For Emily, the familiar comforts of fame and fortune crumble, but for Tuck, this stark new reality could be the chance he needs to finally prove himself. As they come to terms with all they've lost and the bitterness that's kept them apart, they must find their way back to one another and discover a new place, under the sun.