Ross is struggling to keep the Carnmore smelting company afloat - and George Warleggan is determined to crush it. George’s agents are outbidding Carnmore in order to starve it of copper and George is trying to find ways to get to its shareholders, who all remain secret except Ross.
After a rockfall at Wheal Leisure Mark returns home early and finds that Keren is not there. He tracks her to Dwight's house and discovers that they have been sleeping together.
When Verity runs away with Captain Blamey, Francis immediately blames Ross for helping to arrange the scandalous elopement. Ross is furious and denies any involvement, but Francis will not listen and the cousins break irreconcilably. George sees an opportunity and exploits Francis’ anger until he reveals the names of the Carnmore shareholders.
Demelza heads to Trenwith to confess to Francis and beg him to forgive Ross, but Francis flies into a rage and throws her out.
Synopsis via BBC