Amantea is in need of a dragon. If he doesn't capture the dragon, the wizard threatening his family and home will make good on those threats, and as usual Amantea's family is too busy bickering about what should be done to actually do anything.
So he'll just have to capture the dragon himself, which should be a simple enough matter—until the dragon breaks out of his trap like its nothing and promptly kidnaps Amantea so he'll stay out of the way. Amantea isn't certain which is worse: the evil wizard out to destroy his home or the insufferable dragon who can't keep his clothes on. The only thing he does know is that they're all going to be sorry the moment he escapes.