A day’s fishing takes a dramatic turn for Donald and Ewan when, rather than landing a prize catch, Donald hooks a flying mask from the murky depths of the loch. The MoD arrives in force to retrieve the plane, led by Paul’s old Army officer, Alex. Pleased to see his former friend, Paul offers to help in any way he can. However, Isobel is less welcoming, fearing the investigation will uncover the secret identity of the fighter pilot whom she knows is her godfather, Glenbogle’s local butcher, Irvine Taylor. Isobel vows to protect his former wartime identity and, distrusting Paul’s loyalties, urges Golly, Molly and Donald to help her keep the truth hidden. When she is left breathless following an afternoon cycle ride, Molly’s health is cause for concern and, after she collapses, Golly urges her to see the doctor. Alex’s investigations – and the attempts of eager reporter Janey to uncover the truth – are thwarted by Golly, Molly and Isobel. However, after Donald inadvertently gives the game away, Paul is left feeling excluded by his friends and family, and is stung by their conspiracy of silence.