When her own daughter falls for a young lieutenant, Rose has to take a stand against the locals who are out for revenge.
After receiving a book from Captain Dreyfuss, Rose makes a passionate stand for the people of Moybeg.
It is Halloween and the Coyne family finds out the real cost of taking what isn't theirs when an outbreak of scarlet fever feels like the price everyone has to pay for their moral choices.
Rose's younger, glamourous sister Vera arrives in Moybeg for a visit. Adored by Emma, dreaded by Michael, Vera's effervescent presence is soon felt in the Coyne household but when she soon meets the dashing Captain Dreyfuss, even Rose's patience is tested. However, the reality hiding behind Vera's façade begins to emerge, leaving Rose quietly torn between her loyalties to her family and her growing feelings for Dreyfuss.
Rose is preoccupied by Dreyfuss' absence and rejects him when he returns after three weeks. The children are delighted when it is revealed that a Christmas party is going to be held at the aerodrome, but the celebration stirs up tension within the community, especially when Ned Hanlon discovers his family are not invited. Michael receives bad news from his cousin and needs the support of his family more than ever, while Rose is left torn when she learns the reason for Dreyfuss' disappearance during the Christmas party.
