Ruth invites members of a failed community to join the Whitecross settlement, despite the fact that they have been exposed to a disease. When Arthur and Jack contract the illness she fears she may have made an error in judgement. Meanwhile, the self appointed leader of the young new arrivals, Mark Carter (Ian Hastings), advises Charles on where he is going wrong agriculturally and draws up a new plan for him to examine... (thetvdb.com)