Everyone in Clade City knows the Great Big One is coming--a tsunami guaranteed to decimate the West Coast and sink their small coastal town. If they manage to live that long. Nuclear strikes seem increasingly likely. Wildfires. Solar flares, and a growing chance of apocalyptic horsemen. So Griff and the Lost Coast Preppers will be ready. Canning. Stockpiling. Monitoring radio signals. To survive, one must expect the unexpected. But the songs catch Griff and even his twin Leo by surprise.

What begins as a striking moment becomes a competition between Griff and Leo that divides the brothers: Griff toward music and Chastity, a striking new girl with an angelic voice; Leo toward his late-night prepping missions and stealing Chastity's attention away from Griff.

But when a mission to track the source of the music alters the course of Griff's understanding of life, which will win out: hope or fear?