Astrid wants kids but Hiccup is not sure that they're ready.

When escaping the Red Death, Hiccup and Toothless were marked. Now on the scent trail of a murderous dragon, Hiccup leaves with Toothless, not to linger anyplace. Five years time, Berk is thriving, but right on the map of the Red Death. Running is no longer an option for Hiccup and he returns to Berk. But time's toll has had Hiccup become a man in mask, afraid of his true identity.