It's the beginning of May on the island of Roone, two years after Nell Mulcahy called off her wedding to the handsome Tim. Now she's preparing for a very different wedding - but as she sets off for an old church in County Clare, a disappearance on Roone throws the island into turmoil. As the days pass and the search continues, the islanders cope as best they can - Nell adjusting to life as a married woman, Imelda and Hugh discovering the trials of fostering, Laura pregnant and under pressure and teenage Andy finding his first love. Every summer on the island is eventful, but this year brings challenges that test everyone's courage.