Cornerstones follows the lives of Ciara, Jonno, Derry and Mary, four teenagers, homeless in Dublin, living in a derelict building in the city centre. Being homeless isn’t all bad for Jonno Sheehan once he meets Ciara and is invited back to ‘the gaff’. Sex, drugs, drink – what more could a young fellah want? And with the odd bit of knocked-off clobber, Ciara’s dreams of winning The X Factor and living like a star – life on the street is more than bearable. That is until fellow gaff-dweller and wannabe crime-lord Derry decides to build an empire. With everything spinning out of control around him, Jonno just wants to go home.