Every summer, veteran volunteers Helen (67) and Peggy (64) dedicate themselves to Art at Sea. This year, they scan tickets for a controversial and prize-winning work. Helen tries to enjoy her favourite day, but her husband keeps calling, demanding she come home. At day’s end, the women can finally have a go at the installation: a shooting point with a paintball gun aimed at a penis through a glory hole. No one has hit the target yet. It's much too far away. Just as Helen takes her turn, her husband rings again. Shaken and frustrated she makes a decision that takes a dramatic turn. The situation spirals completely out of control... but who was actually crossing the line here?