When the air becomes cold and the fields are bare, a flock of sparrows know it's time to fly south for the winter.

Under the cover of darkness, first one sparrow, then many... take flight! 

A map made of stars guides their way. But when they reach the city, light pollution masks the map and confuses the birds. One sparrow becomes separated from the flock. A girl rescues the lost sparrow and decides to take action. She rallies a group of friends, and together they encourage peple all over the city to help the sparrows by turning off their lights at night.

But will the city be ready by the time the flock return?

Based on the real-life Lights Out movement, this inspiration story shows how even the smallest actions, like flipping a switch, can make a big difference.

From the dust jacket