From the Cherry Picked Games site:
Over a year has passed since the demons took Earth from humanity. Survivors cling to life outside of the demon-controlled cities, struggling to find food, warmth, and security. "Runaways" follows the players through this harsh reality as they escape a demon slave market and chase rumors of a safe haven across the Rocky Mountains.
This guide aids game masters in directing a Catalyst campaign. "Runaways" takes 3-5 players through a short, 4-session campaign.