When Dusty, starving and sick, is picked up on the side of the highway after losing his pack, he's lucky to be alive. The tiny Chihuahua is small enough to fit in two hands and needs special care to be nursed back to health before he can be adopted out to a forever family. Dusty recovers at the Sterling Center, where they train Search and Rescue dogs. Though the Sterlings don't think a dog as small as Dusty can do the tireless work of a SAR dog, an undeterred Dusty shows them that heart and determination matter most. Still, when a massive earthquake hits and lives are at risk, even Dusty has to wonder...does he have what it takes to get the job done?