Until a frantic phone call from a friend with mysterious government ties, Lily thinks her biggest quandary is fixing the problems in her struggling marriage. After she learns the world as they know it is about to end, she has the difficult job of convincing her husband Ethan that it's really happening. As they scramble to survive the approaching solar event, and prepare for the aftereffects, their marriage remains on a shaky foundation. They face the daunting task of repairing their relationship while trying to live through the apocalypse.