Only North

Separated from her tribe. Annabel has to learn that the only way to survive is by going North. On the way she picks up a few Comrades, who are struggling with similar problems. Brax, a survivalist who lost his family. Isaac and Maria, fraternal twins, and runaways. Little by little, they all keep finding some sort of hints on which way Annabel's tribe went. As they travel north they run into dangers and disasters, that might just kill them. During this Journey they try to find a new place to call home and look for any other people that might be alive. While in the doing, also trying to solve the question "Why only go North?"

Annabel: Intelligent, quick thinker, adaptable.
Brax: Strong, husky, survivalist, totally aware.
Isaac: Gentle, nervous, smart, twin sister is Maria.
Maria: Outrageous, annoying, twin brother is Isaac.

Do you think these four people can survive together on their way North?