Faithful dogs help their humans in two classic tales. After a plane crash, a dog trainer (Grace Bradley) is rescued by one of her pets, but her other champion show dog is kidnapped by poachers in Sign of the Wolf. In Crack-Up, a dog helps a pilot (Dave Sharpe) accused of theft. As the real thief (Roger Williams) tries to make off with the cash, canine Flash is hot on his trail. Sign of the Wolf is based on a Jack London story.