Ross's tenacity in helping Ned bears fruit, but not without cost. Hanson’s presence in Cornwall raises suspicion and as Demelza wrestles with how best to equip the community to look after itself, Morwenna lends herself to the cause and finds new hope. Geoffrey Charles and Cecily’s relationship continues to blossom whilst her father Ralph pursues an arrangement with George, but George’s sanity continues to deteriorate and Cary struggles under mounting responsibilities. Bored of being neglected, Valentine decides to break out of Trenwith in search of new friends. Meanwhile, the Enyses look to challenge the county’s high society by hosting a ball to introduce the Despards, before disaster strikes and Ross and Ned must rise into heroic action together.