Siria loves everyone at Pop's firehouse. And she loves the stars in the winter sky. Her mother, who died, named her after Sirius—the Dog Star, brightest in January. But starry nights can fill with flames, and Siria sneaks out to chase the firetrucks. If she's there, everyone will be safe. Still, Siria's not brave like Pop. Her best friend Douglas used to chase with her, and it wasn't so scary. But she did something wrong; they're not friends now. This winter, Siria must learn to be brave. Because she's got to fix things with Douglas; and when Pop is injured, she needs courage, and her friends, more than ever.