1983 - the summer of ABBA, first love and shared secrets for four teenage friends high on life and music. Over three decades on, when Maggie decides to reform the old crowd for an ABBA reunion concern in Stockholm, much has changed. Mother and wife Maggie is coping - alone - with life-shattering news. Daniel, once a major pop star, now a recluse, is reluctantly back in the limelight, and wants nothing more than to escape. Once-wild Dee is a force to be reckoned with in the boardroom, but her marriage tells a different story. And for Charlie, personal happiness has come at a heart-breaking price. As each is about to discover, old friends know you better than anyone. And sometimes, you have to reconnect with who you once were to find out who you can be, if you're just willing to take a chance...