Iona’s past comes back to haunt her when former fiancé, Dr Malcolm McRae, comes to Glenbogle after a tree blight threatens the estates’ forest. Paul calls upon the expertise of tree specialist Malcolm but his positive first impressions quickly change after he discovers the spirited expert had a whirlwind romance with Iona, jilting her ahead of their wedding. Iona insists she no longer loves Malcolm and Paul decides to test her emotions by inviting them both for dinner to Glenbogle. Jess is overworked and undervalued by Golly who is busy with baby Cameron.To add insult to injury, local ghillie Robbie Rintoul snubs her as an entrant for the Annual Highland Challenge, a gruelling test of strength and endurance for local ghillies. Robbie scorns the idea that Jess could be a worthy contestant against the male ghillies but, not to be outdone, Jess decides to enrol, using Molly as her personal trainer. Amy panics after realising she hasn’t prepared properly for her looming art college interview. Molly enlists the help of local artist Danny as Amy’s tutor, stirring Ewan’s jealousy. As the tree disease looms, Malcolm urges Paul to fell the forest immediately. Knowing it will take years to replace the lost trees, Paul is reluctant. Determined to make good of a bad situation, he must find a local sawmill who can turn the wood into profitable timber. Malcolm confides in Paul that he wants to rekindle his romance with Iona. Paul knows he must now reveal his true feelings for Iona or risk losing her for ever to Malcolm.