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Ceathrar dheugairean 脿 Glaschu a' str矛 ris an t-streap as duilighe san RA: An Cuiltheann san Eilean Sgitheanach. Chaidh Rosie, Zach, Mairead agus Siobhan dhan sgoil c貌mhla, agus a-nis tha iad deiseal airson a dhol dhan oilthigh.

Mus d猫an iad sin ge-t脿, tha 霉ine aca airson aon sgiorradh eile c貌mhla, 's iad a' dol air chuairt dh脿n a chuireas iad uile gu deuchainn. Gheibh an sgioba 貌g sti霉ireadh bho sh脿r luchd-i霉il, ach an cois tuaineal, sg矛ths, acras agus fuachd, c貌 a choileanas agus c貌 a dhi霉ltas? An coilean duin' aca an t-streap mu dheireadh, air an st霉c ainmeil, Am Binnein Do-ruigsinneach?

Four school leavers from Glasgow tackle the hardest mountain climb in the UK - the Cuillin Ridge on the Isle of Skye. Rosie, Zach, Mairead and Siobhan all went to school together, and are heading to university. But before they do, there is time for one last adventure. Together they take an epic journey that will test them to the limit.

The gang will be supervised by world-class safety guides. But they will have to face vertigo, fatigue, hunger and the cold. Who will cope, and who will say 'nope'? Will any of them make the final rock climb, up the legendary inaccessible pinnacle?