The renowned opera diva, Bianca Castafiore, is visiting Caiptein Habairadag at his country house, where gossip is rife that the two are about to get married. Paparazzi hordes descend on the place, and as she performs to the cameras Castafiore's jewellery goes missing. Accusations abound, until Tintin finds a clue in an aria which leads to the culprit. Tha Bianca Chastafiore, seinneadair a tha aithichte feadh an t-saoghail, a' cèilidh air an Caiptean Habairadag aig Ceòl na Mara. Tha na pàipearan tabloid nam boil le sgeulachd mu phòsadh a bhith an dàn dhan dithis. Tha dachaigh a' Chaiptein fo phrosbaig luchd nam meadhanan is iad a' lorgdad a bheir dhaibh cinn-naidheadhd. Nuair a thèid smàrag phrìseil Chastafiore a ghoid, tha biadh am pailteas ann dha faoileagan nam faoinsgeul is casaidean gan cuir. Thig air Tintin is am poileas am mèirleach a lorg ach, an toir fuasgladh na cùise trioblaidean an seinneadair gu crìoch? Tha an seinneadair opera ainmeil, Bianca Chastafiore, a' tadhail air an Caiptean Habairadag na dhachaigh air an dùthaich. Tha luchd nam meadhanan mar phlàigh mun taigh agus ise a' mire ris a' chamera, tha an seud prìseil aice air a ghoid. Tha casaidean gan cuir gus am faigh Tintin fuasgladh air a chùis ann an aria.